High free sugars, insulin resistance, and low socioeconomic indicators: the hubs in the complex network of non-communicable diseases in adolescents.

BACKGROUND: Noncommunicable diseases (NCDs) predominantly affect adults, but pathophysiological changes begin decades earlier, as a continuum, with initial events apparent in adolescence. Hence, early identification and intervention are crucial for the prevention and management of NCDs. We investigated the complex network of socioeconomic, behavioral, and metabolic factors associated with the presence of NCD in Brazilian adolescents. METHODS: We conducted a cross-sectional study nested within the São Luís segment of the Ribeirão Preto, Pelotas, and São Luís (RPS) cohort's consortium, focusing on 18-19-year-olds (n = 2515). Data were collected prospectively, from which we constructed a complex network with NCD-related factors/indicators as nodes and their co-occurrences as edges. General and sex-based models analyzed: socioeconomic status, behavioral (smoking, alcohol, and other drugs use, unhealthy diet, poor sleep, physical inactivity), and metabolic factors (overweight/obesity, elevated blood pressure, poor lipid profile). We also looked for NCDs in adolescence like asthma, abnormal spirometry, depression, suicide risk, and poor oral health. The network was characterized by degree, betweenness, eigenvector, local transitivity, Shannon entropy, and cluster coefficient. RESULTS: The adolescents had an average age of 18.3 years, 52.3% were female and 47.7% male. 99.8% of them have a diet rich in free sugars, 15% are overweight/obese and 72.3% had an elevated TyG index. High free sugar emerged as the central hub, followed by high TyG index (an early marker of insulin resistance) and low socioeconomic class. In males, low fiber intake and a high triglycerides/HDL ratio highlighted cardiometabolic concerns; in females, sedentary behavior and poor sleep marked metabolic and psychological challenges, along with caries in both sexes. CONCLUSIONS: Our findings provide insights into central health challenges during adolescence, such as high free sugars, insulin resistance, and low socioeconomic indicators, suggesting that interventions targeted at these central hubs could have a significant impact on their NCD network.

Intimate partner violence during pregnancy and time to return to sexual activity after childbirth: analysis of the BRISA prenatal cohort / Violencia por pareja íntima durante el embarazo y el tiempo para volver a la actividad sexual después del parto: análisis de la cohorte de prenatal BRISA / Violência por parceiro íntimo na gestação e tempo de retorno das atividades sexuais após o parto: análise da coorte de pré-natal BRISA

Abstract: This study aimed to analyze whether there is an association between intimate partner violence during pregnancy and time to return to sexual activity after childbirth in the BRISA cohort in São Luís, Maranhão State, Brazil, between 2010 and 2013. This is a longitudinal study conducted with 665 women. Intimate partner violence during pregnancy was measured using an instrument created and validated by the World Health Organization to measure violence against women. Time to return to sexual activity after childbirth was investigated using a structured questionnaire. Logistic regression models were used to analyze whether there is an association between intimate partner violence during pregnancy and time to return to sexual activity after childbirth. The prevalence of violence by an intimate partner during pregnancy was 24.06%. The prevalence of women who returned to sexual activity within 3 months after childbirth was 67.96%. When analyzing the association between exposure and outcome, no association was found in the crude model (OR = 0.88; 95%CI: 0.60-1.30), nor in the adjusted model (OR = 1.00; 95%CI: 0.61-1.63). The study results highlight the importance of providing comprehensive care to women, considering both physical and psychological aspects, since violence has a significant impact on several aspects of women's lives.

Resumen: El objetivo de este estudio fue analizar si existe asociación entre la violencia por pareja íntima durante el embarazo y el tiempo para volver a la actividad sexual después del parto en la cohorte BRISA, en São Luis, Maranhão, Brasil, entre 2010 y 2013. Se trata de un estudio longitudinal realizado con 665 mujeres. Se midió la violencia por pareja íntima durante el embarazo a través de un instrumento para medir la violencia contra la mujer creado y validado por la Organización Mundial de la Salud. Se investigó el tiempo para volver a la actividad sexual después del parto a través de un cuestionario estructurado. Se utilizaron modelos de regresión logística para verificar si existe asociación entre la violencia por pareja íntima durante el embarazo y el tiempo para volver a la actividad sexual después del parto. La prevalencia de violencia perpetrada por pareja íntima durante el embarazo fue del 24,06%. La prevalencia de mujeres que volvieron a la actividad sexual dentro de los tres meses posteriores al parto fue del 67,96%. Al analizar la asociación entre la exposición y el resultado, se constató que no hubo asociación en el modelo crudo (OR = 0,88; IC95%: 0,60-1,30), ni en el modelo ajustado (OR = 1,00; IC95%: 0,61-1,63). Los resultados del estudio resaltan la importancia de proporcionar asistencia integral a la salud de la mujer, teniendo en cuenta tanto aspectos físicos como psicológicos, una vez que la violencia afecta significativamente varios aspectos de la vida femenina.

Resumo: O objetivo deste estudo foi analisar se existe associação entre violência por parceiro íntimo na gestação e o tempo de retorno das atividades sexuais após o parto na coorte BRISA, em São Luís, Maranhão, Brasil, entre os anos de 2010 e 2013. Trata-se de estudo longitudinal conduzido com 665 mulheres. A violência por parceiro íntimo na gestação foi medida por meio de instrumento criado e validado pela Organização Mundial da Saúde para medir violência contra a mulher. O tempo de retorno das atividades sexuais após o parto foi investigado por meio de questionário estruturado. Modelos de regressão logística foram utilizados para verificar se existe associação entre violência por parceiro íntimo na gestação e tempo de retorno das atividades sexuais após o parto. A prevalência de violência perpetrada pelo parceiro íntimo na gestação foi de 24,06%. A prevalência de mulheres que retornaram às atividades sexuais em até três meses após o parto foi de 67,96%. Ao analisar a associação entre exposição e desfecho, observou-se que não houve associação no modelo bruto (OR = 0,88; IC95%: 0,60-1,30), nem no modelo ajustado (OR = 1,00; IC95%: 0,61-1,63). Os resultados do estudo evidenciam a importância de prestar assistência integral à saúde da mulher, considerando tanto aspectos físicos quanto psicológicos, uma vez que a violência tem impacto significativo em diversas áreas da vida feminina.

Modifiable behavioral risk factors for NCDs and sleep in Brazilian adolescents.

OBJECTIVE: To analyze the association between modifiable behavioral risk factors for non-communicable diseases and sleep parameters in Brazilian adolescents. METHODS: This was a cross-sectional study that used data from the RPS Cohort Consortium, São Luís, Brazil for the follow-up of adolescents aged 18-19 years (n = 2,515). The outcomes were excessive daytime sleepiness (Epworth Sleepiness Scale - ESS) and sleep quality (Pittsburgh Sleep Quality Index - PSQI). The exposures of interest were the behavioral risk factors for non-communicable diseases (NCDs): screen time, physical inactivity, alcohol, smoking, illicit drugs, caffeine intake, and consumption of sugar-sweetened beverages. Excess weight was considered a possible mediator of this association between the exposures of interest and the outcomes. The models were analyzed by modeling with structural equations. RESULTS: Physical inactivity (standardized coefficient, SC = 0.112; p = 0.001), higher consumption of alcohol (SC = 0.168; p = 0.019) and of sugar-sweetened beverages (SC = 0.128; p < 0.001) were associated with excessive daytime sleepiness in adolescents; better socioeconomic status was also associated with this outcome (SC = 0.128; p < 0.001). Physical inactivity (SC = 0.147; p < 0.001) and higher consumption of sugar-sweetened beverages (SC = 0.089; p = 0.003) were also associated with poor sleep quality. Overweight was neither a mediator nor associated with sleep quality or excessive daytime sleepiness. CONCLUSIONS: The main modifiable behavioral risk factors for NCDs are associated with worse sleep parameters already in adolescence, which serves as a warning toward the accumulation of risks for sleep disorders in the future.

Obesity, Insulin Resistance, Caries, and Periodontitis: Syndemic Framework.

(1) Background: To investigate the grouping of obesity and insulin resistance with caries and periodontitis from a syndemic perspective through pathways of socioeconomic inequalities, smoking, alcohol, and high sugar consumption in adolescence. (2) Methods: The population-based RPS Cohort study, São Luís, Brazil, in ages 18-19 years (n = 2515) was used. The outcomes were the grouping of pbesity and Insulin Resistance Phenotype (latent variable formed by Triglycerides/HDL ratio, TyG index, and VLDL) and the Chronic Oral Disease Burden (latent variable comprising caries, bleeding on probing, probing depth ≥ 4 mm, clinical attachment level ≥ 3 mm, and visible plaque index ≥ 15%). Socioeconomic Inequalities influencing the Behavioral Risk Factors (latent variable formed by added sugar, smoking, and alcohol) were analyzed using structural equation modeling. (3) Results: Socioeconomic Inequalities were associated with the Chronic Oral Disease Burden [Standardized Coefficient (SC) = 0.222, p < 0.001]. Behavioral Risk Factors were associated with increased Chronic Oral Disease Burden (SC = 0.103; p = 0.013). Obesity was associated with the Insulin Resistance Phenotype (SC = 0.072; p < 0.001) and the Chronic Oral Disease Burden (SC = 0.066; p = 0.005). The Insulin Resistance Phenotype and the Chronic Oral Disease Burden were associated (SC = 0.053; p = 0.032). (4) Conclusion: The grouping of obesity and early events of diabetes with caries and periodontitis call for a syndemic approach in adolescence.

RANTES and developmental defects of enamel in children: A Brazilian prenatal cohort (BRISA).

OBJECTIVE: Little is known about the effect of maternal immunological factors on the etiology of developmental defects of enamel (DDE). RANTES (Regulated on Activation Normal T Cell Expressed and Secreted) is a chemokine produced by fibroblasts, lymphoid and epithelial mucosa cells in response to various external stimuli. Despite its importance for embryogenesis, RANTES expression has been demonstrated in multiple diseases characterized by inflammation, tumor and immune response, and wound healing. We hypothesized that altered levels of RANTES during pregnancy are associated with the immune and inflammatory response in women, which could lead to the occurrence of DDE in utero (DDE-iu), directly or mediated by preterm birth. Therefore, this study aimed to evaluate the direct and indirect effects of serum levels of RANTES in pregnant women in the occurrence of DDE-iu in children. METHODS: This is a longitudinal case-control study. The mothers and their children (327) were evaluated in three moments: prenatal care, post childbirth, and when the child was between 12.3 and 36 months of age. The analysis was performed with structural equation modeling, estimating the standardized coefficient (SC), adopting α = 5%. RESULTS: There was a direct and negative effect of RANTES on the outcome (SC = -0.137; p = 0.022). This association was not mediated by preterm birth (SC = 0.007; P = 0.551). When considering the specific types of DDE-iu, RANTES had a direct effect on hypoplasia (SC = -0.190; p = 0.007), but not on opacity (SC = 0.343; p = 0.074). CONCLUSION: Lower serum levels of RANTES may contribute to a higher number of teeth with DDE-iu, specifically hypoplasia. However, more evidence supported by clinical, laboratory and epidemiological studies is still needed.

Birth weight and bone mineral density at 18-19 years: birth cohort 1997-1998.

OBJECTIVE: To analyze the association between birth weight and bone mineral density (BMD) in adolescence. METHODS: A birth cohort study in São Luís, Maranhão, using data from two moments: at birth and at 18-19 years. Exposure was the birth weight in grams, continuously analyzed. The outcome was BMD, using the Z-score index (whole body) measured by double X-ray densitometry (Dexa). A theoretical model was constructed in acyclic graphs to identify the minimum set of adjustment variables - household income, the mother knowing how to read and write at the time of birth, prenatal care, tobacco use during pregnancy, and parity - to evaluate the association between birth weight and bone mineral density in adolescence. Multiple linear regression was used in Stata 14.0 software. A 5% significance level was adopted. RESULTS: From 2,112 adolescents, 8.2% had low birth weight and 2.8% had a low BMD for their age. The mean full-body Z-score was 0.19 (± 1.00). The highest birth weight was directly and linearly associated with BMD values in adolescence (Coef.: 0.10; 95%CI: 0.02-0.18), even after adjustment for the variables household income (Coef.: -0.33; 95%CI: -0.66-0.33) and the mother knowing how to read and write (Coef.: 0.23%; 95%CI: 0.03-0.43). CONCLUSION: Although after adjusting the variables the association attenuated, birth weight positively and linearly relates to BMD in adolescence.

Vertical transmission of HIV to neonates in a reference hospital in Northeastern Brazil from 2013 to 2017

ABSTRACT The aim of this study was to estimate the rate of Mother-to-child Transmission (MTCT) of HIV to neonates in a reference university hospital in Sao Luis city, the capital of Maranhao State (MA), evaluating MTCT-associated factors. A retrospective cohort study based on data from the Notifiable Diseases Data System (SINAN) was carried out and included all HIV-exposed neonates notified from 2013 to 2017 by the university hospital. The study population comprised 725 HIV-exposed neonates, of whom 672 neonates were exposed and uninfected, and 53 were exposed and infected. The estimated rate of MTCT in the period of 2013 to 2017 was 7.3%. Most pregnant women were ≥ 20 years old (86.9%), reported ≥ 8 years of schooling (53.2%), reported full-time or independent paid work (46.9%) and were residents in other cities of the state (61.7%). Regarding healthcare, 86.3% received prenatal care, 74.6% received Antiretroviral Therapy (ART) as prophylaxis during pregnancy, 81.8% received ART prophylaxis during childbirth and 78.1% underwent cesarean section. Among the neonates, 92.8% received ART prophylaxis and 94.3% were not breastfed. Despite these variables, the 7.3% MTCT rate found in this study makes it clear that the interventions recommended by the Ministry of Health were not fully adopted.

Sleep characteristics and excessive daytime sleepiness in adolescents and adults: results from the birth cohorts of three Brazilian cities — RPS Consortium / Características do sono e sonolência diurna excessiva em adolescentes e adultos: resultados das coortes de nascimento de três cidades brasileiras - Consórcio RPS

ABSTRACT Objective: To describe the prevalence of insufficient sleep duration, long sleep latency, terminal or maintenance insomnia, subjective sleep quality, and excessive daytime sleepiness among participants of birth cohorts conducted in three Brazilian cities, and to evaluate differences in prevalence rates within cohorts according to sociodemographic characteristics. Methods: Cross-sectional analyses involving adolescents and adults participating in four birth cohorts conducted in Ribeirão Preto (RP78 and RP94), Pelotas (PEL93) and São Luís (SL97/98). Sleep duration, latency, terminal or maintenance insomnia, and subjective sleep quality were obtained through the Pittsburgh Sleep Quality Index; and excessive daytime sleepiness was assessed using the Epworth Sleepiness Scale. Differences in the prevalence of the outcomes were analyzed in each cohort according to sociodemographic characteristics (skin color, marital status, socioeconomic status, study and working at the time of the interview) stratified by sex. Results: Insufficient sleep duration was the most common outcome at the four cohorts, with higher frequency among men. Long latency was more frequently reported by young adult women in RP94 and PEL93 cohorts, and insomnia by women of the four cohorts, when compared to men of the same age. Women generally suffered more from excessive daytime sleepiness and evaluated the quality of their sleep more negatively than men. In addition to sex, being a student and working were associated with the largest number of outcomes in both sexes. Conclusion: Sleep disorders are more prevalent in women, reinforcing the need for greater investment in sleep health in Brazil, without disregarding gender and socioeconomic determinants.

RESUMO Objetivo: Descrever a prevalência de duração do sono, latência, insônia terminal, qualidade subjetiva do sono e sonolência diurna excessiva entre participantes de coortes de nascimentos realizadas em três cidades brasileiras, bem como avaliar as diferenças nas taxas de prevalência das coortes de acordo com características sociodemográficas. Métodos: Análises transversais envolvendo participantes de quatro coortes de nascimento realizadas em Ribeirão Preto (RP78 e RP94), Pelotas (PEL93) e São Luís (SL97). A duração, a latência, a insônia terminal e a qualidade subjetiva do sono foram obtidas por meio do Índice de Qualidade do Sono de Pittsburgh; e a sonolência diurna excessiva foi avaliada pela Escala de Sonolência de Epworth. As diferenças na prevalência dos desfechos foram analisadas em cada coorte segundo características sociodemográficas estratificadas por sexo. Resultados: A duração insuficiente do sono foi o desfecho mais comum nas quatro coortes, com maior frequência entre os homens. Latência longa foi mais frequentemente relatada por mulheres adultas jovens nas coortes RP94 e PEL93, e insônia por mulheres das quatro coortes, quando comparadas a homens da mesma idade. As mulheres geralmente sofriam mais com sonolência diurna excessiva e avaliavam a qualidade do sono de forma mais negativa do que os homens. Além do sexo, ser estudante e trabalhar estiveram associados ao maior número de desfechos em ambos os sexos. Conclusão: Os distúrbios do sono são mais prevalentes em mulheres, reforçando a necessidade de maior investimento na saúde do sono no Brasil, sem desconsiderar gênero e determinantes socioeconômicos.

Do childhood depressive symptoms interfere with intelligence in adulthood? / Sintomas depressivos na infância interferem na inteligência na idade adulta?

ABSTRACT OBJECTIVE To investigate the effects of depressive symptoms in childhood on the intellectual development of young adults. METHODS Study conducted with a birth cohort of São Luís, Maranhão, Brazil, composed of 339 participants evaluated between 7 and 9 years and between 18 and 19 years. Structural equation modeling (young adult education, sex, race/color) and childhood variables (nutritional status, depressive symptoms, cognitive function, head of household's and mother's education, family income) were used. In addition, head of household's occupation, mother's age, and presence of partner were tested as determinants of adults' intelligence quotient (IQ). RESULTS Presence of depressive symptoms in childhood triggered a reduction of 0.342 in standard deviation (SD) and -3.83 points in the average IQ of adults (p-value < 0.001). Cognitive function in childhood had a total and direct positive effect (standardized coefficient [SC] = 0.701; p-value < 0.001) on IQ, increasing 7.84 points with each increase in level. A positive indirect effect of child nutritional status (SC = 0.194; p-value = 0.045), head of household's (SC = 0.162; p-value = 0.036), and mother's education was identified, the latter mediated by cognitive function in childhood (SC = 0.215; p-value = 0.012) on the IQ of young people. CONCLUSION Presence of depressive symptoms in childhood triggered a long-term negative effect on intelligence, reducing the IQ score in adulthood.

RESUMO OBJETIVO Investigar os efeitos dos sintomas depressivos na infância no desenvolvimento intelectual do adulto jovem. MÉTODOS Estudo realizado com uma coorte de nascimentos de São Luís, Maranhão, Brasil, composta por 339 participantes avaliados entre 7 e 9 anos e entre 18 e 19 anos. Utilizou-se modelagem de equações estruturais (escolaridade do adulto jovem, sexo, raça/cor) e variáveis da infância (estado nutricional, sintomas depressivos, função cognitiva, escolaridade do chefe da família e da mãe, renda familiar). Além disso, ocupação do chefe da família, idade da mãe e presença de companheiro foram testadas como determinantes do quociente de inteligência (QI) dos adultos. RESULTADOS A presença de sintomas depressivos na infância gerou redução de 0,342 no desvio-padrão (DP) e -3,83 pontos no QI médio dos adultos (valor de p < 0,001). A função cognitiva na infância apresentou efeito total e direto positivo (coeficiente padronizado [CP] = 0,701; valor de p < 0,001) sobre o QI, elevando 7,84 pontos a cada aumento do nível. Identificou-se efeito indireto positivo do estado nutricional infantil (CP = 0,194; valor de p = 0,045), escolaridade do chefe da família (CP = 0,162; valor de p = 0,036) e da mãe da criança, este último mediado pela função cognitiva na infância (CP = 0,215; valor de p = 0,012) sobre o QI dos jovens. CONCLUSÃO A presença de sintomas depressivos na infância gerou efeito negativo de longo prazo sobre a inteligência, reduzindo a pontuação do QI na idade adulta.

Birth weight and bone mineral density at 18-19 years: birth cohort 1997-1998 / Peso ao nascer e densidade mineral óssea aos 18-19 anos: coorte de nascimentos 1997-1998

ABSTRACT OBJECTIVE To analyze the association between birth weight and bone mineral density (BMD) in adolescence. METHODS A birth cohort study in São Luís, Maranhão, using data from two moments: at birth and at 18-19 years. Exposure was the birth weight in grams, continuously analyzed. The outcome was BMD, using the Z-score index (whole body) measured by double X-ray densitometry (Dexa). A theoretical model was constructed in acyclic graphs to identify the minimum set of adjustment variables - household income, the mother knowing how to read and write at the time of birth, prenatal care, tobacco use during pregnancy, and parity — to evaluate the association between birth weight and bone mineral density in adolescence. Multiple linear regression was used in Stata 14.0 software. A 5% significance level was adopted. RESULTS From 2,112 adolescents, 8.2% had low birth weight and 2.8% had a low BMD for their age. The mean full-body Z-score was 0.19 (± 1.00). The highest birth weight was directly and linearly associated with BMD values in adolescence (Coef.: 0.10; 95%CI: 0.02-0.18), even after adjustment for the variables household income (Coef.: -0.33; 95%CI: -0.66-0.33) and the mother knowing how to read and write (Coef.: 0.23%; 95%CI: 0.03-0.43). CONCLUSION Although after adjusting the variables the association attenuated, birth weight positively and linearly relates to BMD in adolescence.

RESUMO OBJETIVO Analisar a associação entre o peso ao nascer e a densidade mineral óssea (DMO) na adolescência. MÉTODOS Estudo de coorte de nascimentos em São Luís, Maranhão, utilizando dados de dois momentos: ao nascimento e aos 18-19 anos. A exposição foi o peso ao nascer em gramas, analisado de forma contínua. O desfecho foi a DMO, utilizando o índice Z-escore (corpo inteiro) medido pela densitometria por dupla emissão de raios X (DEXA). Foi construído modelo teórico em gráficos acíclicos direcionados para identificar o conjunto mínimo de variáveis de ajuste - renda familiar, a mãe saber ler e escrever à época do nascimento, realização de pré-natal, tabagismo durante a gestação e paridade - para avaliar a associação entre o peso ao nascer e a densidade mineral óssea na adolescência. Utilizou-se regressão linear múltipla no software Stata 14.0. O nível de significância adotado foi de 5%. RESULTADOS Dos 2.112 adolescentes, 8,2% apresentaram baixo peso ao nascer e 2,8% apresentaram DMO considerada baixa para a idade. O Z-escore médio de corpo inteiro foi de 0,19 (± 1,00). O maior peso ao nascer foi associado de forma linear e direta aos valores de DMO na adolescência (Coef.: 0,10; IC95% 0,02-0,18), mesmo após ajuste para as variáveis renda familiar (Coef.: -0,33; IC95% -0,66-0,33) e a mãe saber ler e escrever (Coef.: 0,23; IC95% 0,03-0,43). CONCLUSÕES Apesar de a associação ter sido atenuada após ajuste das variáveis, o peso ao nascer está associado de forma positiva e linear à DMO na adolescência.

Modifiable behavioral risk factors for NCDs and sleep in Brazilian adolescents / Fatores de risco comportamentais modificáveis para DNT e sono em adolescentes brasileiros

ABSTRACT OBJECTIVE To analyze the association between modifiable behavioral risk factors for non-communicable diseases and sleep parameters in Brazilian adolescents. METHODS This was a cross-sectional study that used data from the RPS Cohort Consortium, São Luís, Brazil for the follow-up of adolescents aged 18-19 years (n = 2,515). The outcomes were excessive daytime sleepiness (Epworth Sleepiness Scale - ESS) and sleep quality (Pittsburgh Sleep Quality Index - PSQI). The exposures of interest were the behavioral risk factors for non-communicable diseases (NCDs): screen time, physical inactivity, alcohol, smoking, illicit drugs, caffeine intake, and consumption of sugar-sweetened beverages. Excess weight was considered a possible mediator of this association between the exposures of interest and the outcomes. The models were analyzed by modeling with structural equations. RESULTS Physical inactivity (standardized coefficient, SC = 0.112; p = 0.001), higher consumption of alcohol (SC = 0.168; p = 0.019) and of sugar-sweetened beverages (SC = 0.128; p < 0.001) were associated with excessive daytime sleepiness in adolescents; better socioeconomic status was also associated with this outcome (SC = 0.128; p < 0.001). Physical inactivity (SC = 0.147; p < 0.001) and higher consumption of sugar-sweetened beverages (SC = 0.089; p = 0.003) were also associated with poor sleep quality. Overweight was neither a mediator nor associated with sleep quality or excessive daytime sleepiness. CONCLUSIONS The main modifiable behavioral risk factors for NCDs are associated with worse sleep parameters already in adolescence, which serves as a warning toward the accumulation of risks for sleep disorders in the future.

RESUMO OBJETIVO Analisar a associação entre fatores de risco comportamentais modificáveis para doenças não transmissíveis e parâmetros do sono em adolescentes brasileiros. MÉTODOS Estudo transversal que utilizou dados do Consórcio de Coortes RPS, São Luís, Brasil para o seguimento de adolescentes de 18-19 anos (n = 2.515). Os desfechos foram a sonolência diurna excessiva (Escala de Sonolência de Epworth - ESE) e a qualidade do sono (Índice de Qualidade do Sono de Pittsburgh - IQSP). As exposições de interesse foram os fatores de risco comportamentais para doenças não transmissíveis (DNT): tempo de tela, inatividade física, álcool, cigarro, drogas ilícitas, consumo de cafeína, consumo de bebidas adoçadas com açúcar. O excesso de peso foi considerado um possível mediador dessa associação entre as exposições de interesse e os desfechos. Os modelos foram analisados por modelagem com equações estruturais. RESULTADOS A inatividade física (Coeficiente padronizado, CP = 0,112; p = 0,001), maior consumo de álcool (CP = 0,168; p = 0,019) e de bebidas adoçadas com açúcar (CP = 0,128; p < 0,001) foram associados a sonolência diurna excessiva nos adolescentes; a melhor situação socioeconômica também foi associada a este desfecho (CP = 0,128; p < 0,001). A inatividade física (CP = 0,147; p < 0,001) e o maior consumo de bebidas adoçadas com açúcar (CP = 0,089; p = 0,003) também se associaram com a qualidade do sono ruim. O excesso de peso não foi mediador e nem associado à qualidade do sono ou à sonolência diurna excessiva. CONCLUSÕES Os principais fatores de risco comportamentais modificáveis para DNT estão associados a piores parâmetros do sono já na adolescência; alertando para um quadro de acúmulos de riscos para distúrbios de sono no futuro.

Are Fat Mass and Lean Mass Associated with Grip Strength in Adolescents?

Background: The interaction between lean body mass (LBM) and fat mass index (FMI) with grip strength (GS) has not been explored in the same analysis model in adolescents. This study thus aims to analyze the association between FMI and LBM with GS. Methods: This cross-sectional study was conducted with data from the 2016 follow-up of the 1997/98 Birth Cohort of São Luís. Grip strength was assessed by the Jamar Plus + dynamometer. The LBM and FMI indexes were assessed [ratio of the mass (lean or fat-kg) to height (m2)]. The confounding variables identified for the relationship between FMI and LBM with GS in the same analysis model, by directed acyclic graph (DAG), were sex, age, race, work, alcohol consumption, smoking, physical activity, and consumption of ultra-processed foods and culinary preparations, used in the adjusted analysis. Results: A total of 2339 adolescents (52.5% girls) were analyzed. The boys have a higher GS than the girls. In the adjusted analysis, with each increase of 1 kg/m2 in the FMI, GS was reduced by 0.72 kgf for boys and 0.35 kgf for girls. At each increase of 1 kg/m2 in the LBM, GS increased by 2.18 kgf for boys and 1.26 kgf for girls. Conclusions: FMI was associated with lower GS regardless of the LBM. LBM was associated with higher GS regardless of the FMI.

Fatores associados à mortalidade perinatal em uma capital do Nordeste brasileiro / Factors associated with perinatal mortality in a Brazilian Northeastern capital

Resumo O objetivo do estudo foi avaliar os fatores sociodemográficos, maternos e do recém-nascido associados à mortalidade perinatal em São Luís, Maranhão. Os óbitos perinatais foram identificados na coorte e pelo Sistema de Informações sobre Mortalidade. Foram incluídos 5.236 nascimentos, sendo 70 óbitos fetais e 36 neonatais precoces. Para investigar os fatores associados utilizou-se análise de regressão logística com modelo hierarquizado. O coeficiente de mortalidade perinatal foi 20,2 por mil nascimentos. A baixa escolaridade materna e a ausência de companheiro foram associadas a maior chance de óbito perinatal. A família ser chefiada por outros familiares foi fator de proteção. Tiveram maior chance de óbito perinatal filhos de mães que não realizaram pelo menos seis consultas de pré-natal (OR=4,61; IC95%:2,43-8,74) e com gravidez múltipla (OR=9,15; IC95%:4,08-20,53). Presença de malformações congênitas (OR=4,13; IC95%:1,23-13,82), nascimento pré-termo (OR= 3,36; IC95%: 1,56-7,22) e baixo peso ao nascer (BPN) (OR=11,87; IC95%:5,46-25,82) se associaram ao óbito perinatal. A mortalidade perinatal foi associada à vulnerabilidade social, não realização do número de consultas pré-natal recomendado, malformações congênitas, nascimento pré-termo e BPN.

Abstract This study investigated factors associated with perinatal mortality in São Luís, Maranhão, Northeastern Brazil. Data on perinatal mortality were obtained from the BRISA birth cohort and from the Mortality Information System, including records of 5,236 births, 70 of which referred to fetal deaths and 36 to early neonatal deaths. Factors associated with mortality were investigated using a hierarchical logistic regression model, resulting in a perinatal mortality coefficient equal to 20.2 per thousand births. Mothers with low education level and without a partner were associated with an increased risk of perinatal death. Moreover, children of mothers who did not have at least six antenatal appointments and with multiple pregnancies (OR= 9.15; 95%CI:4.08-20.53) were more likely to have perinatal death. Perinatal death was also associated with the presence of congenital malformations (OR= 4.13; 95%CI:1.23-13.82), preterm birth (OR= 3.36; 95%CI:1.56-7.22), and low birth weight (OR=11.87; 95%CI:5.46-25.82). In turn, families headed by other family members (OR= 0.29; 95%CI: 0.12 - 0.67) comprised a protective factor for such condition. Thus, the results indicate an association between perinatal mortality and social vulnerability, non-compliance with the recommended number of prenatal appointments, congenital malformations, preterm birth, and low birthweight.

Behavioral risk factors for noncommunicable diseases associated with depression and suicide risk in adolescence.

Noncommunicable diseases (NCDs) and mental disorders cooccur in adulthood, which is why their determinants and common risk factors should be addressed at an early age. Therefore, we estimated the association of the major risk factors for NCDs with depression and suicide risk by structural equation modeling considering pathways triggered by social vulnerability or mediated by obesity. This population-based study included 2,515 Brazilian adolescents. The following exposures were the major risk factors for NCDs: substance use behaviors (variable deduced from alcohol, tobacco, and drug use), physical inactivity, and components of unhealthy eating markers (added sugar and saturated fat). Obesity was assessed using the fat mass index. The outcomes were depression and suicide risk. Depression was associated with substance use behaviors (SC = 0.304; p < 0.001), added sugar (SC = 0.094; p = 0.005), and females (SC = 0.310; p < 0.001). Suicide risk was also associated with substance use behaviors (SC = 0.356; p < 0.001), added sugar (SC = 0.100; p = 0.012), and females (SC = 0.207; p < 0.001). In adolescents, these associations may help explain the cluster of NCDs and mental disorders in adulthood.

Is sleep time associated with handgrip strength in adolescents from the 1997/1998 São Luís Birth Cohort? / O tempo de sono está associado à força de preensão manual em adolescentes da Coorte de São Luís de 1997/1998?

Abstract This article aims to analyze the association between sleep time and handgrip strength in adolescents belonging to the 1997/1998 São Luís Birth Cohort. This was a cross-sectional study nested in a birth cohort study. One thousand two hundred sixty-nine individuals (18 and 19 years) wore an Actigraph® GTX3+ accelerometer on their wrist 24 hr/day for 7 consecutive days. Handgrip strength was measured using a digital hand dynamometer. We used directed acyclic graphs (DAG) to identify confounding variables. This sample of adolescents was mostly composed of men, with brown skin color, economic class C, which did not work, did not consume alcohol, did not smoke, and never used drugs. The mean value of handgrip strength was 28.2 (±9.3) kgf, and the mean of sleep time was 6 (±1.0) hours per day. The crude analysis showed an association between sleep time and muscle strength. An increase of one hour of sleep reduced the handgrip strength by 1.95 kgf (95%CI:-2.51;-1.39). However, after adjustment for confounders, the association was not maintained (β:-0.07; 95%CI:-0.48;0.36). Sleep time is not associated with handgrip strength in adolescents in São Luís.

Resumo O objetivo deste artigo é analisar a associação entre tempo de sono e força de preensão manual em adolescentes da Coorte de Nascimentos de São Luís 1997/1998. Estudo transversal aninhado a um estudo de coorte de nascimentos. Mil duzentos e sessenta e nove indivíduos (18 e 19 anos) usaram um acelerômetro Actigraph® GTX3 + em seu pulso 24 horas/dia por sete dias consecutivos. A força de preensão manual foi medida por meio de um dinamômetro digital de mão. Usou-se gráficos acíclicos direcionados (DAG) para identificar variáveis ​​de confusão. A amostra de adolescentes foi composta em sua maioria por homens, de cor da pele parda, classe econômica C, que não trabalhava, não consumiam álcool, não fumavam e nunca usaram drogas. O valor médio da força de preensão manual foi de 28,2 (±9,3) kgf, e a média do tempo de sono foi de seis (±1,0) horas por dia. A análise bruta mostrou associação entre tempo de sono e força muscular. O aumento de uma hora de sono reduziu a força de preensão manual em 1,95 kgf (IC95%:-2,51;-1,39). No entanto, após o ajuste para fatores de confusão, a associação não foi mantida (β:-0,07; IC95%:-0,48;0,36). O tempo de sono não foi associado à força de preensão manual em adolescentes de São Luís.

Síndrome congênita pelo vírus zika: análise das redes de apoio de pais / Síndrome congénito por el virus del zika: análisis de las redes de apoyo de padres / Congenital zika syndrome: analysis of parent support networks

Resumo Objetivo Compreender o papel das redes de apoio no cuidado de crianças acometidas pela Síndrome Congênita pelo Vírus Zika. Métodos Estudo qualitativo, realizado em Centro de Referência Estadual em Neurodesenvolvimento, no nordeste brasileiro, entre abril de 2017 e fevereiro de 2018. Participaram pais de crianças com microcefalia atendidos no local. Foram realizadas 18 entrevistas semiestruturadas, sendo três com pai e mãe e 15 somente com mães, totalizando 21 participantes. A amostra foi definida pelo critério de saturação e foi utilizada análise de conteúdo na modalidade temática. Resultados Os resultados são apresentados a partir das categorias de análise "rede informal" e "rede formal". A rede de apoio informal, especialmente os avós, exerceu importante suporte emocional e financeiro aos pais. As redes sociais virtuais se destacaram como espaço de compartilhamento de informações e experiências. Quanto à rede de apoio formal, as famílias estabeleceram vínculos mais fortes com profissionais da atenção especializada que ofertaram suporte técnico e acolhimento aos pais e às crianças. Já a atenção primária desempenhou mais o papel de encaminhamento para a atenção especializada. Foram relatados diferentes graus de resolutividade por parte dos municípios, em termos de programas, de atuação de gestores e de profissionais. Conclusão As redes informais e formais atuaram de modo complementar no tratamento e apoio às crianças com Síndrome Congênita pelo Vírus Zika. A inserção em diferentes redes informais possibilitou apoio social para enfrentar o impacto provocado pela doença. Apesar do investimento do Ministério da Saúde na atenção primária foi identificada fragilidade neste nível de atenção.

Resumen Objetivo Comprender el papel de las redes de apoyo en el cuidado de niños afectados por el síndrome congénito por el virus del zika. Métodos Estudio cualitativo, realizado en un Centro de Referencia Regional en Neurodesarrollo, en el nordeste brasileño, entre abril de 2017 y febrero de 2018. Participaron padres de niños con microcefalia atendidos en el lugar. Se realizaron 18 entrevistas semiestructuradas, de las cuales tres fueron con el padre y la madre y 15 solo con madres, un total de 21 participantes. La muestra fue definida por el criterio de saturación y se utilizó análisis de contenido en la modalidad temática. Resultados Los resultados se presentan a partir de las categorías de análisis "red informal" y "red formal". La red de apoyo informal, especialmente los abuelos, ejerció un importante soporte emocional y financiero para los padres. Las redes sociales virtuales se destacaron como un espacio para compartir información y experiencias. Respecto a la red de apoyo formal, las familias establecieron vínculos más fuertes con profesionales de la atención especializada, que ofrecieron soporte técnico y acogida a los padres y a los niños. Por otro lado, la atención primaria cumplió más el papel de derivar a la atención especializada. Se relataron diferentes niveles de resolución de problemas por parte de los municipios, en términos de programas, de actuación de gestores y de profesionales. Conclusión Las redes informales y formales actuaron de modo complementario en el tratamiento y apoyo a niños con síndrome congénito por el virus del zika. La inserción en diferentes redes informales permitió un apoyo social para enfrentar el impacto provocado por la enfermedad. A pesar de las inversiones en atención primaria del Ministerio de Salud, se identificó fragilidad en este nivel de atención.

Abstract Objective To understand the role of support networks in the care of children affected by Congenital Zika Syndrome. Methods This is a qualitative study, conducted at a State Reference Center on Neurodevelopment, in northeastern Brazil, between April 2017 and February 2018. Parents of children with microcephaly treated at the site participated. 18 semi-structured interviews were conducted, three with father and mother and 15 only with mothers, totaling 21 participants. The sample was defined by the saturation criterion and content analysis was used in the thematic modality. Results The results are presented from the categories of analysis "informal network" and "formal network". The informal support network, especially grandparents, exercised important emotional and financial support to parents. Virtual social networks stood out as a space for sharing information and experiences. Regarding the formal support network, the families established stronger bonds with specialized care professionals who offered technical support and care to parents and children. Primary care, on the other, played the role of referral to specialized care. Different degrees of resolution were reported by the municipalities, in terms of programs, the performance of managers and professionals. Conclusion Formal and formal networks acted in a complementary way in the treatment and support of children with Congenital Zika Syndrome. The insertion in different indirect networks allowed social support to face the impact caused by the disease. Despite the ministry of health's investment in primary care, fragility was identified in this level of care.

Associações entre duração de sono e índices de massa gorda, muscular e corporal em adolescentes de São Luís, Maranhão, Brasil / Associations between sleep duration and fat mass, lean mass, and body mass index in adolescents in São Luís, Maranhão State, Brazil / Asociaciones entre duración del sueño e índices de masa grasa, muscular y corporal en adolescentes de São Luís, Maranhão, Brasil

O objetivo do estudo foi avaliar a associação entre duração de sono e composição corporal em adolescentes. Estudo transversal, com 1.269 adolescentes de 18 e 19 anos da coorte de nascimentos de 1997/1998 de São Luís, Maranhão, Brasil. A duração do sono foi avaliada a partir dos dados registrados por acelerometria. A composição corporal foi avaliada pelo o índice de massa gorda (IMG), índice de massa muscular (IMM) e índice de massa corporal (IMC). Os fatores de confusão foram identificados em gráfico acíclico direcionado no programa DAGitty 3.0. Foram realizadas análises descritivas para todas as variáveis e, posteriormente, regressão linear, com estimativa dos coeficientes de regressão brutos e ajustados, com os respectivos intervalos de 95% de confiança (IC95%). Nos adolescentes do sexo masculino, cada hora a mais de sono associou-se a reduções de 0,30kg/m2 do IMM (IC95%: -0,45; -0,15), de 0,26kg/m2 do IMG (IC95%: -0,48; -0,03) e 0,61kg/m2 do IMC (IC95%: -0,93; -0,30). Nas adolescentes, cada hora a mais de sono associou-se à redução de 0,22kg/m2 do IMM (IC95%: -0,36; -0,07). A maior duração do sono associou-se a menor IMM em ambos os sexos e menor IMG e IMC no sexo masculino, o que evidencia a importância de ter adequadas horas de sono para melhorar os índices de composição corporal.

The study aimed to assess the association between sleep duration and body composition in adolescents. A cross-sectional study was performed with 1,269 adolescents from the 1997/1998 birth cohort in São Luís, Maranhão State, Brazil, 18 and 19 years of age. Sleep duration was assessed with accelerometry data. Body composition was assessed with fat mass index (FMI), lean mass index (LMI), and body mass index (BMI). Confounding factors were identified in a directed acyclic graph in DAGitty 3.0. Descriptive analyses were performed for all variables, followed by linear regression, with estimation of crude and adjusted regression coefficient with respective 95% confidence intervals (95%CI). In adolescent boys, each additional hour of sleep was associated with reductions of 0.30kg/m2 in LMI (95%CI: -0.45; -0.15), 0.26kg/m2 in FMI (95%CI: -0.48; -0.03), and 0.61kg/m2 in BMI (95%CI: -0.93; -0.30). In adolescent girls, each additional hour of sleep was associated with a reduction of 0.22kg/m2 in LMI (95%CI: -0.36; -0.07). Longer duration of sleep was associated with lower LMI in both sexes and lower FMI and BMI in boys, evidencing the importance of adequate hours of sleep for improving body composition indices.

El objetivo fue evaluar la asociación entre duración del sueño y composición corporal en adolescentes. Estudio transversal, con 1.269 adolescentes de 18 y 19 años de la cohorte de nacimientos de 1997/1998 de São Luís, Maranhão, Brasil. La duración del sueño se evaluó a partir de los datos registrados por acelerometría. La composición corporal se evaluó por el índice de masa grasa (IMG), índice de masa muscular (IMM) e índice de masa corporal (IMC). Los factores de confusión se identificaron en un gráfico acíclico dirigido en el programa DAGitty 3.0. Se realizaron análisis descriptivos para todas las variables y, posteriormente, regresión lineal, con estimación de los coeficientes de regresión brutos y ajustados, con los respectivos intervalos de 95% de confianza (IC95%). En los adolescentes del sexo masculino, cada hora más de sueño se asoció con reducciones de 0,30kg/m2 del IMM (IC95%: -0,45; -0,15), de 0,26kg/m2 del IMG (IC95%: -0,48; -0,03) y 0,61kg/m2 del IMC (IC95%: -0,93; -0,30). En las adolescentes, cada hora más de sueño se asoció a la reducción de 0,22kg/m2 del IMM (IC95%: -0,36; -0,07). La mayor duración del sueño se asoció a un menor IMM en ambos sexos y menor IMG e IMC en el sexo masculino, lo que evidencia la importancia de tener adecuadas horas de sueño para mejorar los índices de composición corporal.

Diabetes mellitus type 2: factors related to adherence to self-care / Diabetes mellitus tipo 2: factores relacionados a la adhesión al autocuidado / Diabetes mellitus tipo 2: fatores relacionados com a adesão ao autocuidado

ABSTRACT Objectives: to analyze the sociodemographic and clinical variables related to the adherence to self-care activities in people with diabetes mellitus type 2. Methods: quantitative, cross-sectional study, carried out with 270 people with diabetes from December 2019 to October 2020, in São Luís, Maranhão. Results: the adherence to self-care was greater when it comes to medications (Md=7.0) and foot care (Md= 6.0), but lower in regard to blood sugar testing (Md=1.0), exercise (Md=2,0), and diet (general) (Md=4.0). The variables age group (p=0.007), educational level (p=0.015), body mass index (p=0.035), complications with diabetes (p=0.009), and nutritional follow-up (p=0.000) had associations with self-care activities. Conclusions: identifying the factors related to the adherence to self-care was found to be essential to strengthen the line of care in chronic diseases and to direct educational actions, aiming to improve the quality of life of people with diabetes.

RESUMEN Objetivos: analizar variables sociodemográficas y clínicas relacionadas a la adhesión a actividades de autocuidado en personas con diabetes mellitus tipo 2. Métodos: estudio cuantitativo, transversal, realizado con 270 personas con diabetes, entre diciembre de 2019 y octubre de 2020, en São Luís, Maranhão. Resultados: hubo adhesión más favorable al autocuidado cuanto al uso del medicamento (Md=7,0) y cuidados con los pies (Md= 6,0) y adhesión menos deseable cuanto al monitoreo de la glucemia (Md=1,0), práctica de actividad física (Md=2,0) y alimentación general (Md=4,0). Las variables franja etaria (p=0,007), escolaridad (p=0,015), índice de masa corporal (p=0,035), complicación del diabetes (p=0,009) y acompañamiento nutricional (p=0,000) presentaron relación con las actividades de autocuidado. Conclusiones: la identificación de factores relacionados a la adhesión al autocuidado se mostró esencial para el fortalecimiento de la línea de cuidados en enfermedades crónicas y direccionamiento de acciones educativas, visando mejorar la calidad de vida de personas con diabetes.

RESUMO Objetivos: analisar as variáveis sociodemográficas e clínicas relacionadas com a adesão às atividades de autocuidado em pessoas com diabetes mellitus tipo 2. Métodos: estudo quantitativo, transversal, realizado com 270 pessoas com diabetes, entre dezembro de 2019 e outubro de 2020, em São Luís, Maranhão. Resultados: houve adesão mais favorável ao autocuidado quanto ao uso do medicamento (Md=7,0) e cuidados com os pés (Md= 6,0) e adesão menos desejável quanto à monitorização da glicemia (Md=1,0), prática da atividade física (Md=2,0) e alimentação geral (Md=4,0). As variáveis faixa etária (p=0,007), escolaridade (p=0,015), índice de massa corporal (p=0,035), complicação do diabetes (p=0,009) e acompanhamento nutricional (p=0,000) apresentaram associação com as atividades de autocuidado. Conclusões: a identificação dos fatores relacionados com a adesão ao autocuidado mostrou-se essencial para o fortalecimento da linha de cuidados em doenças crônicas e direcionamento das ações educativas, visando melhorar a qualidade de vida das pessoas com diabetes.

Abuse, disrespect and mistreatment during childbirth care: contribution of the Ribeirão Preto cohorts, Brazil / Abuso, desrespeito e maltrato na assistência ao parto: contribuição das Coortes de Ribeirão Preto, Brasil

Abstract This study aimed to estimate the perception and frequency of abuse, disrespect and mistreatment (ADM) situations during childbirth care of 745 women from the Ribeirão Preto birt cohorts. Confidential questionnaires containing one question regarding perceived abuse during childbirth care and other questions addressing exposure to ADM situations were applied. The chi-squared test was used to compare the situations presented between women who did and did not report mistreatment using the Stata 14.0 software. Among the 745 women evaluated, 66.2% were exposed to some situation of ADM and 8.3% reported having perceived ADM. The most frequent situations were that the woman could not eat or drink (30.5%), the woman had her belly squeezed to help the child be born (27.5%), and the woman could not stay with a companion of her choice (25.5%). Women who reported to have suffered maltreatment more frequently responded positively to all situations of ADM when compared to the other participants, except for the following statements: "I was not allowed to eat or drink anything" (p = 0.975) and "I was forced to have a cesarean delivery against my will" (p = 0.073). Although most women of the Ribeirão Preto cohorts reported exposure to ADM situations during childbirth care, a minority perceived disrespect or mistreatment.

Resumo O objetivo do estudo foi estimar percepção e ocorrência de situações de abuso, desrespeito e maltrato (ADM) na assistência ao parto de 745 mulheres pertencentes às coortes de nascimentos de Ribeirão Preto. Foram aplicados questionários sigilosos contendo uma pergunta sobre percepção de maltrato na assistência ao parto e outras sobre exposição a situações de ADM. Utilizou-se o teste qui-quadrado para comparar as situações apresentadas entres as mulheres que relataram ou não maltrato. A análise foi realizada por meio do programa Stata 14. Das 745 mulheres avaliadas, 66,2% foram expostas a alguma situação de ADM e 8,3% referiram ter percebido ADM. As situações mais frequentes foram: 30,5% não puderam comer nem beber nada; 27,5% tiveram sua barriga apertada para ajudar a criança a nascer; e 25,5% não puderam ficar com acompanhante de sua escolha. Mulheres que afirmaram ter sofrido maltrato apresentaram maiores frequências de respostas positivas a todas situações de ADM quando comparadas com às demais, exceto para os seguintes relatos: "Não me deixaram comer nem beber nada" (p = 0,975) e "Fui forçada a ter parto cesáreo contra minha vontade" (p = 0,073). Apesar de a maior parte das mulheres pertencentes às coortes de Ribeirão Preto relatarem exposição a situações de ADM durante a assistência ao parto, uma minoria percebeu desrespeito ou maltrato.

Physical activity in birth cohorts of three Brazilian cities (Ribeirão Preto, Pelotas, and São Luís): A cross-sectional study / Atividade física em coortes de nascimento de três cidades brasileiras (Ribeirão Preto, Pelotas e São Luís): estudo transversal

ABSTRACT Objective: To describe the prevalence of physical activity among subjects from birth cohorts of three cities located in different regions of Brazil according to sociodemographic characteristics and sex, comparing the relationships within and between cohorts. Methods: Cross-sectional study involving 12,724 adolescents and young adults who participated in five birth cohorts: Ribeirão Preto [1978/79 (37/39 years old in 2016) and 1994 (22 years in 2016)]; Pelotas [1982 (30 years in 2012) and 1993 (22 years in 2015)], and São Luís [1997/98 (18/19 years in 2016)]. Leisure-time physical activity was evaluated with questionnaires (insufficiently active: <150 min/week and active: ≥150 min/week) and moderate and vigorous physical activity (MVPA) was objectively measured by accelerometry. Those, in each city, were evaluated accordingly to skin color, socioeconomic classification, and study/work activities. Results: The prevalence of leisure-time physical activity ranged from 29.2% at 30 years old in Pelotas to 54.6% among adolescents from São Luís. The prevalence of leisure-time physical activity was higher among younger people (54.6% in São Luís 1997), while the same was not observed for total physical activity. MVPA (3rd tercile) was higher in the cohorts from Pelotas and São Luís. The prevalence of leisure-time physical activity and MVPA was higher in men. The data showed that the variation in physical activity was associated with sex and sociodemographic conditions in all cohorts. Conclusion: Sociodemographic characteristics should be considered when promoting leisure-time physical activity and actions aimed at young people, and adults who are more socioeconomically vulnerable should be encouraged.

RESUMO Objetivo: Descrever a prevalência de atividade física entre sujeitos de coortes de nascimento de três cidades localizadas em diferentes regiões do Brasil segundo características sociodemográficas e sexo, comparando relações intra e intercoortes. Métodos: Estudo transversal com 12.724 adolescentes e adultos jovens que participaram de cinco coortes de nascimento: Ribeirão Preto [1978/79 (37/39 anos em 2016) e 1994 (22 anos em 2016)]; Pelotas [1982 (30 anos em 2012) e 1993 (22 anos em 2015)] e São Luís [1997/98 (18/19 anos em 2016)]. A atividade física no lazer foi avaliada com questionários (insuficientemente ativo: <150 min/semana; ativo: ≥150 min/semana) e a atividade física moderada e vigorosa (AFMV) foi medida objetivamente por acelerometria. Foram avaliadas a cor da pele, a classificação socioeconômica e as atividades de estudo/trabalho. Resultados: A prevalência de ativos no lazer variou de 29,2% aos 30 anos em Pelotas a 54,6% entre os adolescentes de São Luís. A prevalência de ativos no lazer foi maior entre os mais jovens (54,6% em São Luís/1997), o que não foi observado para a atividade física total. A AFMV (3o tercil) foi maior nas coortes de Pelotas e São Luís. A prevalência de ativos no lazer e a AFMV foi maior nos homens. Os dados mostraram que a variação da atividade física foi associada ao sexo e às condições sociodemográficas em todas as coortes. Conclusão: As características sociodemográficas devem ser consideradas na promoção da atividade física no lazer e as ações voltadas para jovens e adultos mais vulneráveis socioeconomicamente devem ser incentivadas.