Prevalence of dyslipidemia, atherogenic and cardiovascular risk in overweight and obese adolescents.

OBJECTIVE: To analyze the lipid profile and cardiovascular risk of overweight and obese adolescents and correlate the findings with anthropometric measurements. METHODS: This is a cross-sectional study on overweight and obese adolescents of both sexes (aged 14 to 18 years old). The collected variables were sex, weight, height, age, total cholesterol, triglycerides, High-density lipoprotein (HDL) and low-density lipoprotein (LDL). The Atherogenic Index of Plasma and Castelli Risk Indices I and II were calculated. These indices were classified into cutoff points to stratify cardiovascular risk. The anthropometric profile was evaluated by Z score according to Body Mass Index for age. Significance level was considered as p≤0.05. RESULTS: A total of 146 adolescents participated in the study; the mean age was 16.4±1.1 years and most of them were girls (74.7%) and obese (52.7%). The prevalent dyslipidemias were high triglycerides (47.9%), LDL (26.7%), total cholesterol (37.7%), and low HDL (46.6%). Most adolescents presented increased atherogenic risk according to the Atherogenic Index of Plasma (55.5%); 15.1% presented high cardiovascular risk according to Castelli Risk Index I; and 13.7%, according to Castelli Risk Index II. Boys presented higher values of anthropometric measurements and Castelli Risk Indices I and II in relation to girls - who, conversely, presented higher values of HDL. There was a positive correlation of the Z score with Atherogenic Index of Plasma and a negative correlation with HDL. CONCLUSIONS: The adolescents of the study presented high prevalence of cardiovascular and atherogenic risk according to the evaluated indices. In addition, the increased cardiovascular risk was correlated with higher Body Mass Index.

Prevalence of dyslipidemia, atherogenic and cardiovascular risk in overweight and obese adolescents / Prevalência de dislipidemia, risco aterogênico e cardiovascular em adolescentes com sobrepeso e obesidade

Abstract Objective: To analyze the lipid profile and cardiovascular risk of overweight and obese adolescents and correlate the findings with anthropometric measurements. Methods: This is a cross-sectional study on overweight and obese adolescents of both sexes (aged 14 to 18 years old). The collected variables were sex, weight, height, age, total cholesterol, triglycerides, High-density lipoprotein (HDL) and low-density lipoprotein (LDL). The Atherogenic Index of Plasma and Castelli Risk Indices I and II were calculated. These indices were classified into cutoff points to stratify cardiovascular risk. The anthropometric profile was evaluated by Z score according to Body Mass Index for age. Significance level was considered as p≤0.05. Results: A total of 146 adolescents participated in the study; the mean age was 16.4±1.1 years and most of them were girls (74.7%) and obese (52.7%). The prevalent dyslipidemias were high triglycerides (47.9%), LDL (26.7%), total cholesterol (37.7%), and low HDL (46.6%). Most adolescents presented increased atherogenic risk according to the Atherogenic Index of Plasma (55.5%); 15.1% presented high cardiovascular risk according to Castelli Risk Index I; and 13.7%, according to Castelli Risk Index II. Boys presented higher values of anthropometric measurements and Castelli Risk Indices I and II in relation to girls — who, conversely, presented higher values of HDL. There was a positive correlation of the Z score with Atherogenic Index of Plasma and a negative correlation with HDL. Conclusions: The adolescents of the study presented high prevalence of cardiovascular and atherogenic risk according to the evaluated indices. In addition, the increased cardiovascular risk was correlated with higher Body Mass Index.

RESUMO Objetivo: Analisar o perfil lipídico e os índices de risco cardiovascular de adolescentes com sobrepeso e obesidade e correlacionar os achados com medidas antropométricas. Métodos: Estudo transversal com adolescentes com sobrepeso ou obesidade de ambos os sexos (14 a 18 anos). Foram coletadas as variáveis: sexo, peso, altura, idade, colesterol total, triglicerídeos, lipoproteína de alta densidade (HDL-c) e lipoproteína de baixa densidade (LDL-c). Calcularam-se o índice aterogênico plasmático e os índices de Castelli I e II. Eles foram classificados em pontos de corte para estratificar o risco cardiovascular. O perfil antropométrico foi avaliado por meio do escore Z com base no índice de massa corporal para a idade. Considerou-se o nível de significância p≤0,05. Resultados: Foram incluídos 146 adolescentes, com média de idade de 16,4±1,1 anos, a maioria do sexo feminino (74,7%) e obesa (52,7%). As dislipidemias prevalentes foram: triglicerídeos (47,9%), LDL-c (26,7%), colesterol total (37,7%) elevado e HDL-c baixo (46,6%). A maioria apresentou risco aterogênico aumentado pelo índice aterôgenico plasmático (55,5%); 15,1% apresentaram alto risco cardiovascular segundo o índice de Castelli I e 13,7%, segundo o índice de Castelli II. Os meninos apresentaram valores superiores de medidas antropométricas e índices de Castelli I e II em relação às meninas, que, por outro lado, apresentaram valores superiores de HDL-c. Houve correlação positiva do escore Z com o índice aterôgenico plasmático e negativa com HDL-c. Conclusões: Os adolescentes do estudo apresentaram alta prevalência de risco cardiovascular e aterogênico conforme os índices avaliados. Além disso, o risco cardiovascular aumentado foi correlacionado com maior índice de massa corporal.

Intervenção interdisciplinar reduz o consumo de alimentos ultraprocessados em adolescentes com sobrepeso ou obesidade / Interdisciplinary intervention reduces the consumption of ultra-processed foods in adolescents with overweight or obesity

Este estudo objetivou avaliar o efeito da intervenção interdisciplinar com abordagem motivacional sobre o consumo de alimentos ultraprocessados em adolescentes com sobrepeso ou obesidade. O método utilizado foi um ensaio clínico randomizado no qual os participantes distribuíram-se em grupo controle (GC) e grupo intervenção (GI). A coleta de dados do consumo alimentar ocorreu mediante o recordatório de 24 horas, obtido no início e ao final das intervenções. Os alimentos consumidos foram categorizados nos quatro grupos da classificação alimentar NOVA conforme o grau de processamento a qual são submetidos. Participaram 42 adolescentes com média de idade de 16,5±1,3 anos, a maioria do gênero feminino (69%). No GI, a média de quilocalorias de alimentos ultraprocessados diminuiu 37,5% após a intervenção; em contrapartida, aumentou o consumo de alimentos processados em ambos os grupos. Concluiu-se que a intervenção interdisciplinar com abordagem motivacional foi eficaz na redução do consumo de alimentos ultraprocessados na população estudada.

The aim of this study was to evaluate the effect of interdisciplinary intervention with motivational approach on the consumption of ultra-processed foods in overweight or obese adolescents. The method used was a randomized clinical trial in which participants were allocated to control group (CG) and intervention group (IC). The data collection of food consumption occurred through the 24-hour food record, obtained at the beginning and end of interventions. The foods consumed were classified into the four NOVA groups according to the degree of processing which they are submitted. Forty-two adolescents with a mean age of 16.5±1.3 years, mostly female (69%), participated in the study. In IG, the average kcal of ultra-processed foods decreased by 37.5% after intervention. In contrast, there was an increase in the consumption of processed foods in both groups. It was concluded that the interdisciplinary intervention with a motivational approach was effective in reducing the consumption of ultra-processed foods in the studied population.

Intervention Protocol Based on Transtheoretical Model of Behavior Change for Metabolic Syndrome / Protocolo de Intervenção Baseada no Modelo Transteórico de Mudança de Comportamento para Síndrome Metabólica

Abstract The present study is the translation and adaptation of an intervention based on the Transtheoretical Model of Change directed to patients at cardiovascular risk. The original 29-session manual was translated into Portuguese, extended to 36 sessions, and applied in a pilot study. The protocol was reduced to 12 sessions through the grouping based on the processes of change. The products of the present study were the processes in each behavior, the versatility of the protocol, the interdisciplinary work, the great cost-benefit, and the potential of effectiveness. Finally, the importance of consistent training in Motivational Interview, Transtheoretical Model and group management for proper use are highlighted, and the costs and benefits of protocols versus more flexible treatments are discussed.

Resumo Trata-se da tradução e adaptação de uma intervenção baseada no Modelo Transteórico de Mudança e direcionada para pacientes com risco cardiovascular. Inicialmente, o manual original com 29 sessões foi traduzido para a língua portuguesa, sendo ampliado para 36 sessões, e posteriormente aplicado em um estudo piloto. A partir de agrupamentos pelos processos de mudança, foi reduzido para 12 sessões. Evidencia-se como produtos deste trabalho o aprofundamento dos processos em cada comportamento, a versatilidade do protocolo, o trabalho interdisciplinar, o ótimo custo-benefício e o potencial de efetividade. Por fim, salienta-se a importância de um treinamento consistente em Entrevista Motivacional, Modelo Transteórico e manejo de grupos para sua utilização adequada, e discute-se os custos e os benefícios dos protocolos versus tratamentos mais flexíveis.

Fatores preditivos de desistência em um programa para adolescentes com sobrepeso ou obesidade: estudo MERC / Predictive factors of dropout from a program for overweight or obese adolescents: MERC study / Factores predictivos de desistimiento en un programa para adolescentes con sobrepeso u obesidad: estudio MERC

O objetivo deste estudo foi identificar fatores potenciais de impacto sobre a desistência em um ensaio clínico randomizado. Para participar das 12 semanas de intervenção, foram selecionados adolescentes com sobrepeso ou obesidade (IMC percentil ≥ 85), dos sexos masculino e feminino, com média de idade 16,44±1,09. Utilizou-se regressão logística binária para responder pelo desfecho de não conclusão. As regressões foram realizadas por blocos e as variáveis estudadas foram características demográficas e antropométricas, marcadores metabólicos, aspectos motivacionais, funcionamento psicológico e percepção das práticas alimentares parentais. Foi constatada uma taxa de desistência de 48,8%. A maior chance de desistência foi explicada no modelo final de regressão pela autoeficácia para mudança de estilo de vida (OR: 0,732; IC95%: 0,581-0,921; p=0,008), pelo suporte familiar (OR: 0,807; IC95%: 0,685-0,950; p=0,010), pela HbA1c (OR: 11,366; IC95%: 3,123-37,702; p=0,010) e por fatores relacionados às práticas alimentares parentais. Concluiu-se que a família e os aspectos relacionados à motivação para mudança podem ser determinantes de desistência em programas para perda de peso para adolescentes.

The number of overweight or obese adolescents has increased, but the rate of dropping out in programs for this population is high. The objective of this study was to identify potential factors of impact on dropping out in a randomized clinical trial. To take part in a 12-week intervention, overweight or obese adolescents (BMI percentile ≥ 85), males and females, with mean age 17.99±1.09 were selected. Binary logistic regression was used to account for the non-completion outcome. Regressions were performed by blocks and the variables studied were demographic and anthropometric traits, metabolic markers, motivational aspects, psychological functioning, and perception of parental food practices. The drop-out rate was 48.8%. The highest chance of withdrawal was explained in the final regression model by self-efficacy to change lifestyle (OR: 0.732; IC95%: 0.581-0.921; p=0.008), by family support (OR: 0.807; IC95%: 0.685-0.950; p=0.010), by HbA1c (OR: 11.366; IC95%: 3.123-37.702; p=0.010), and by factors associated with parental food practices. It was concluded that the family and aspects related to motivation for change can be determinants of dropping-out in weight-loss programs for teenagers.

El objetivo de este estudio fue identificar factores potenciales del impacto sobre la desistencia en un ensayo clínico aleatorizado. Se seleccionaron para participar en 12 semanas de intervención, adolescentes con sobrepeso u obesidad (IMC percentil ≥ 85), del sexo masculino y femenino con media de edad 16,44±1,09. Se utilizó regresión logística binaria para responder por el resultado de conclusión incompleta. Las regresiones fueron realizadas por bloques y las variables estudiadas fueron características demográficas y antropométricas, marcadores metabólicos, aspectos motivacionales, funcionamiento psicológico y percepción de las prácticas alimentarias parentales. La tasa de desistimiento fue de 48,8%. La mayor probabilidad de desistimiento fue explicada en el modelo final de regresión por auto-eficacia para el cambio de estilo de vida (OR: 0,732, IC95%: 0,581-0,921, p=0,008), por el soporte familiar (OR: 0,807, IC95%: 0,685-0,950; p=0,010), por la HbA1c (OR: 11,366, IC95%: 3,123-37,702; p=0,010) y por factores relacionados con las prácticas alimentarias parentales. Se concluyó que la familia y los aspectos relacionados con la motivación para el cambio pueden ser determinantes de la desistencia de programas para la pérdida de peso para los adolescentes.

Effect of an interdisciplinary intervention with motivational approach on exercise capacity in obese adolescents: a randomized controlled clinical trial.

Objective To evaluate the effect of an interdisciplinary intervention with a motivational approach on exercise capacity and usual physical activity levels in overweight and obese adolescents. Methods This is a randomized, controlled clinical trial with single blinding of subjects. Adolescents aged 15 to 18 years with overweight and obesity (body mass index ≥ 85 percentile) were included. The adolescents were randomized into two groups: interdisciplinary intervention or control - traditional approach aiming at lifestyle modifications. The initial evaluations were carried out, including the cardiopulmonary exercise test and the physical activity level measurement by using the International Physical Activity Questionnaire and a pedometer. The evaluations were performed in two moments: time zero (time of inclusion in the study) and after 3 months (end of intervention). There were 12 sessions with weekly meetings. Results A total of 37 participants were included, 19 in the Intervention Group. There were no significant differences in the baseline demographic, anthropometric and physical activity characteristics between groups, with mean age of 17.3±1.0 years in the Control Group, and 16.8±0.9 years in the Intervention Group (p=0.14). The motivational intervention did not cause significant differences (p>0.05) in the comparison of the variables of exercise capacity and usual physical activity (questionnaire and pedometer) between groups. Conclusion The intervention with a motivational approach did not alter exercise capacity and levels of usual physical activity in overweight and obese adolescents. Clinical Trial Registry: NCT02455973 and REBEC: RBR-234nb5.

Transtheoretical model for change in obese adolescents: MERC randomized clinical trial.

The randomized controlled trial evaluated the effectiveness of an intervention based on the Transtheoretical Model of Change on anthropometric, metabolic and motivational outcomes in obese adolescents. A total of 135 male and female adolescents were randomized to two groups: intervention group (n = 65) and control group (n = 70). The adolescents were evaluated 1 week before the interventions began and at the end of 12 weeks. There was no statistically significant difference between groups in the outcome variables. Intervention group reported magnitude of effect more expressive on body mass index percentile, waist circumference, waist-to-hip ratio, readiness to change diet and readiness to start exercise.

Effect of an interdisciplinary intervention with motivational approach on exercise capacity in obese adolescents: a randomized controlled clinical trial / Efeito de intervenção interdisciplinar com abordagem motivacional na capacidade de exercício em adolescentes obesos: ensaio clínico controlado randomizado

ABSTRACT Objective To evaluate the effect of an interdisciplinary intervention with a motivational approach on exercise capacity and usual physical activity levels in overweight and obese adolescents. Methods This is a randomized, controlled clinical trial with single blinding of subjects. Adolescents aged 15 to 18 years with overweight and obesity (body mass index ≥ 85 percentile) were included. The adolescents were randomized into two groups: interdisciplinary intervention or control − traditional approach aiming at lifestyle modifications. The initial evaluations were carried out, including the cardiopulmonary exercise test and the physical activity level measurement by using the International Physical Activity Questionnaire and a pedometer. The evaluations were performed in two moments: time zero (time of inclusion in the study) and after 3 months (end of intervention). There were 12 sessions with weekly meetings. Results A total of 37 participants were included, 19 in the Intervention Group. There were no significant differences in the baseline demographic, anthropometric and physical activity characteristics between groups, with mean age of 17.3±1.0 years in the Control Group, and 16.8±0.9 years in the Intervention Group (p=0.14). The motivational intervention did not cause significant differences (p>0.05) in the comparison of the variables of exercise capacity and usual physical activity (questionnaire and pedometer) between groups. Conclusion The intervention with a motivational approach did not alter exercise capacity and levels of usual physical activity in overweight and obese adolescents. Clinical Trial Registry: NCT02455973 and REBEC: RBR-234nb5.

RESUMO Objetivo Avaliar o efeito de uma intervenção interdisciplinar com abordagem motivacional na capacidade de exercício e no nível de atividade física habitual em adolescentes com sobrepeso e obesidade. Métodos Trata-se de ensaio clínico controlado, randomizado, com cegamento único dos indivíduos. Foram incluídos adolescentes com idade entre 15 e 18 anos, com sobrepeso e obesidade (índice de massa corporal ≥ percentil 85). Os adolescentes foram randomizados em dois grupos: intervenção interdisciplinar motivacional ou controle − abordagem tradicional, visando à modificação do estilo de vida. Foram realizadas as avaliações iniciais incluindo o teste de exercício cardiopulmonar e a aferição do nível de atividade física por meio do International Physical Activity Questionnaire e do pedômetro. As avaliações foram realizadas em dois momentos, no tempo zero (inclusão no estudo) e após 3 meses (término da intervenção). Foram realizadas 12 sessões com encontros semanais. Resultados Foram incluídos 37 participantes, sendo 19 no Grupo Intervenção. Não houve diferenças significativas nos dados basais de características demográficas, antropométricas e de atividade física entre os grupos, e a média de idade foi de 17,3±1,0 anos no Grupo Controle e 16,8±0,9 anos no Intervenção (p=0,14). A intervenção motivacional não provocou diferenças significativas (p>0,05) na comparação das variáveis de capacidade de exercício e atividade física habitual (questionário e pedômetro) entre os grupos. Conclusão A intervenção com abordagem motivacional não alterou a capacidade de exercício e os níveis de atividade física habitual em adolescentes com sobrepeso e obesidade. Clinical Trial Registry: NCT02455973 and REBEC: RBR-234nb5.

Comparação do consumo alimentar calculado a partir de duas tabelas de composição de alimentos / Comparing food intake calculated by two lists of food composition

O objetivo do presente trabalho foi comparar o consumo de energia, macronutrientes e micronutrientes calculado a partir de duas tabelas de composição dos alimentos: Tabela Brasileira de Composição de Alimentos (TACO) mais informações de rótulos de alimentos e United States Department of Agriculture Food Composition Databases (USDA). Trata-se de estudo transversal, com dados do consumo alimentar de participantes do estudo principal "Modificação do Estilo de Vida e Risco Cardiovascular". Os dados foram analisados por meio dos Testes de Kruskal Wallis, Post Hoc de Dunn, e Correlação de Pearson. Foram avaliados 59 Recordatórios de 24 horas e as medianas de 21 entre 29 nutrientes (72,4%) apresentaram diferença estatisticamente significativa (p<0,05) na comparação entre os resultados obtidos das tabelas avaliadas. Foram encontradas divergências significativas entre os valores nutricionais apresentados nas tabelas. Este fato alerta para o uso destes instrumentos e a sua influência nos resultados do cálculo do consumo alimentar e impacto na prescrição nutricional

Energy, macronutrient and micronutrient intakes are compared by two food composition lists: Brazilian Food Composition List and nutrition facts and the United States Department of Agriculture Food Composition Databases (USDA). Current transversal study comprised data on food intake of participants within the main research theme 'Changes in Life Style and Cardiovascular Risks'. Data were analyzed by Kruskal Wallis and Post-Hoc Dunn tests and by Pearson´s Co-relation test. Fifty-nine 24-h records were evaluated. Medians of 21 out of 29 nutrients (72.4%) showed statistically significant difference (p<0.05) when compared to results from evaluated tables. There was significant divergence between the nutrition rates in the lists. The above is a warning on the use of these tools and their influence on results in calculating food intake and impact in nutritional prescriptions

Melhora do estilo de vida reduz o índice de Castelli 1 em indivíduos com síndrome metabólica / Lifestyle improvement reduces Castelli 1 index in people with metabolic syndrome

Avaliar o efeito de diferentes intervenções para modificação do estilo de vida sobre o Índice de Castelli 1 em indivíduos com síndrome metabólica. Tratou-se de uma subanálise de um ensaio clínico randomizado. Foram incluídos no estudo indivíduos com diagnóstico de síndrome metabólica e idade entre 30 e 59 anos, que foram posteriormente randomizados em três diferentes grupos de intervenção. Foram realizadas avaliações antropométricas e bioquímicas no início do estudo e ao final dos três meses de intervenção. Participaram do estudo 59 indivíduos. Os modelos de intervenção realizados nos grupos intervenção individual e intervenção em grupo foram eficazes na redução significativa do índice de Castelli 1, com variância absoluta de -0,70 e -0,23, respectivamente. O modelo de intervenção padrão não demonstrou redução favorável. As intervenções que contemplaram acompanhamento multiprofissional produziram efeito benéfico na redução do índice de Castelli 1 em pacientes com síndrome metabólica.

The effect of different interventions for lifestyle modification on Castelli I Index in people with metabolic syndrome is evaluated. It is a sub-analysis of a randomized clinical assay. People with metabolic syndrome, aged between 30 and 59 years old, were included and later divided, at random, into three different intervention groups. Anthropometric and biochemical evaluations of 59 people were performed at the start and at the end of the three months of intervention. Intervention models undertaken in individual intervention groups and intervention in groups were efficient to significantly reduce Castelli 1 Index, with absolute variance of -0.70 and -0.23, respectively. Standard intervention model did not reveal favorable reduction. Interventions that underscored multiprofessional following up produced beneficent effect on the reduction of Castelli 1 Index in patients with metabolic syndrome.

MAXIMUM HEART RATE MEASURED VERSUS ESTIMATED BY DIFFERENT EQUATIONS DURING THE CARDIOPULMONARY EXERCISE TEST IN OBESE ADOLESCENTS. / FREQUÊNCIA CARDÍACA MÁXIMA MEDIDA VERSUS ESTIMADA POR DIFERENTES EQUAÇÕES DURANTE O TESTE DE EXERCÍCIO CARDIOPULMONAR EM ADOLESCENTES OBESOS.

OBJECTIVE: To compare the values of measured maximum heart rate (HRmax) and maximum heart rate estimated by different equations during the cardiopulmonary exercise test (CPET) in obese adolescents. METHODS: This is a cross-sectional study. Adolescents aged between 15 and 18 years old, with obesity (BMI Z-score>2.0) were included. Demographic and anthropometric data were collected, followed by CPET, recording HRmax. The highest heart rate reached at peak exercise was considered as HRmax. The comparison between measured and estimated HRmax values was performed using four previous equations. Descriptive statistics and the ANOVA test (Bonferroni post-test) were used. RESULTS: Fifty-nine obese adolescents were included, 44% of them male. The mean age was 16.8±1.2 years old and the BMI (Z-score) was 3.0±0.7. At peak exercise, the mean HRmax (bpm) was 190.0±9.2, the respiratory coefficient was 1.2±0.1, and the VO2max (mL/kg/min) was 26.9±4.5. When comparing the measured values of HRmax with those estimated by the different formulas, the equations "220-age", "208-0.7 x age" and "207-0.7 x age" were shown to overestimate (p<0.001) the measured HRmax results in obese adolescents. Only the "200-0.48 x age" equation presented similar results (p=0.103) with the values measured in the CPET. CONCLUSIONS: The findings of the present study demonstrate that the equation "200-0.48 x age" seems to be more adequate to estimate HRmax in obese adolescents.

OBJETIVO: Comparar os valores de frequência cardíaca máxima (FCmáx) medidos e estimados por diferentes equações durante o teste de exercício cardiopulmonar (TECP) em adolescentes obesos. MÉTODOS: Trata-se de um estudo transversal. Foram incluídos adolescentes, de idades entre 15 e 18 anos, com obesidade (escore-Z do índice de massa corpórea - IMC>2,0). Coletaram-se dados demográficos e antropométricos, seguidos da realização do TECP, pela qual foi registrada a FCmáx. O valor mais elevado de frequência cardíaca (FC) atingida no pico do exercício foi considerado como a FCmáx. A comparação entre os valores de FCmáx medidos e os estimados pelas equações foi realizada empregando-se quatro equações prévias. Utilizaram-se a estatística descritiva e o teste de ANOVA (pós-teste de Bonferroni). RESULTADOS: Foram incluídos 59 adolescentes obesos, sendo 44% do sexo masculino. A média de idade foi de 16,8±1,2 anos e a do IMC (escore-Z), de 3,0±0,7. No pico do exercício, a média de FCmáx (batimentos por minuto - bpm) foi de 190,0±9,2, o coeficiente de troca respiratória de 1,2±0,1 e o consumo máximo de oxigênio - VO2máx (mL/kg/min) - de 26,9±4,5. Ao comparar-se os valores medidos de FCmáx com os estimados pelas diferentes fórmulas, demonstrou-se que as equações "220-idade", "208-0,7 x idade" e a "207-0,7 x idade" superestimam (p<0,001) os resultados medidos de FCmáx em adolescentes obesos. Apenas a equação "200-0,48 x idade" apresentou resultados similares (p=0,103) com os valores mensurados no TECP. CONCLUSÕES: Os achados do presente estudo demonstram que a equação "200-0,48 x idade" parece ser mais adequada para estimar a FCmáx em adolescentes obesos.

Frequência cardíaca máxima medida versus estimada por diferentes equações durante o teste de exercício cardiopulmonar em adolescentes obesos / Maximum heart rate measured versus estimated by different equations during the cardiopulmonary exercise test in obese adolescents

RESUMO Objetivo: Comparar os valores de frequência cardíaca máxima (FCmáx) medidos e estimados por diferentes equações durante o teste de exercício cardiopulmonar (TECP) em adolescentes obesos. Métodos: Trata-se de um estudo transversal. Foram incluídos adolescentes, de idades entre 15 e 18 anos, com obesidade (escore-Z do índice de massa corpórea - IMC>2,0). Coletaram-se dados demográficos e antropométricos, seguidos da realização do TECP, pela qual foi registrada a FCmáx. O valor mais elevado de frequência cardíaca (FC) atingida no pico do exercício foi considerado como a FCmáx. A comparação entre os valores de FCmáx medidos e os estimados pelas equações foi realizada empregando-se quatro equações prévias. Utilizaram-se a estatística descritiva e o teste de ANOVA (pós-teste de Bonferroni). Resultados: Foram incluídos 59 adolescentes obesos, sendo 44% do sexo masculino. A média de idade foi de 16,8±1,2 anos e a do IMC (escore-Z), de 3,0±0,7. No pico do exercício, a média de FCmáx (batimentos por minuto - bpm) foi de 190,0±9,2, o coeficiente de troca respiratória de 1,2±0,1 e o consumo máximo de oxigênio - VO2máx (mL/kg/min) - de 26,9±4,5. Ao comparar-se os valores medidos de FCmáx com os estimados pelas diferentes fórmulas, demonstrou-se que as equações "220-idade", "208-0,7 x idade" e a "207-0,7 x idade" superestimam (p<0,001) os resultados medidos de FCmáx em adolescentes obesos. Apenas a equação "200-0,48 x idade" apresentou resultados similares (p=0,103) com os valores mensurados no TECP. Conclusões: Os achados do presente estudo demonstram que a equação "200-0,48 x idade" parece ser mais adequada para estimar a FCmáx em adolescentes obesos.

ABSTRACT Objective: To compare the values of measured maximum heart rate (HRmax) and maximum heart rate estimated by different equations during the cardiopulmonary exercise test (CPET) in obese adolescents. Methods: This is a cross-sectional study. Adolescents aged between 15 and 18 years old, with obesity (BMI Z-score>2.0) were included. Demographic and anthropometric data were collected, followed by CPET, recording HRmax. The highest heart rate reached at peak exercise was considered as HRmax. The comparison between measured and estimated HRmax values was performed using four previous equations. Descriptive statistics and the ANOVA test (Bonferroni post-test) were used. Results: Fifty-nine obese adolescents were included, 44% of them male. The mean age was 16.8±1.2 years old and the BMI (Z-score) was 3.0±0.7. At peak exercise, the mean HRmax (bpm) was 190.0±9.2, the respiratory coefficient was 1.2±0.1, and the VO2max (mL/kg/min) was 26.9±4.5. When comparing the measured values of HRmax with those estimated by the different formulas, the equations "220-age", "208-0.7 x age" and "207-0.7 x age" were shown to overestimate (p<0.001) the measured HRmax results in obese adolescents. Only the "200-0.48 x age" equation presented similar results (p=0.103) with the values measured in the CPET. Conclusions: The findings of the present study demonstrate that the equation "200-0.48 x age" seems to be more adequate to estimate HRmax in obese adolescents.

SALIVARY CORTISOL AND METABOLIC SYNDROME COMPONENT'S ASSOCIATION.

BACKGROUND: Actually the lifestyle exposes the population to several risk factors related to alimentary habits and less physical activity that contributes to chronic diseases appearance worldwide. AIM: To analyze the association between salivary cortisol and the components of metabolic syndrome. METHODS: This is a cross-sectional study. As part of it, 28 individuals aged 30-59 years presenting three or more of the following findings: CA: ≥88 cm for women and ≥102 cm for men; SBP>130 mmHg and DBP>85 mmHg; GL>100 mg/dl; TG>150 mg/dl; HDL<40 mg/dl for men and <50 mg/dl for women. Was performed analysis of salivary cortisol (by radioimmunoassay) from 25 salivary samples collected throughout the day, for evaluating changes in the circadian rhythm of this hormone (8AM, noon and 8PM). RESULTS: 28 evaluated individuals had a mean age of 51.9±7.5 years, mostly women (64.3%) and a mean of BMI 33.6±3.2 kg/m². The cortisol level from the 8AM averaged 18.7±4.8 ng/dlL. Individuals with FPG>110mg/dl, have significantly lower average levels of cortisol than ones with FPG <110 (12.8±5,2 vs. 17.3±4.2). Significant correlations were HOMA vs. WC (r=0,465; p˂0,005) and TG (r=0,473; p˂0,005), WC vs. FG (r=0,446; p˂0,005) and BMI (r=0,730; p˂0.0001); TG vs. HDL (r=0,441 p˂0,005) and FG (r=0,440; p˂0,005). CONCLUSION: Morning salivary cortisol in subjects with chronically elevated blood glucose can represent a downregulation of the hypothalamic-pituitary adrenal axis. This is an important finding not yet well investigated.

O Modelo Transteórico para Auxiliar Adolescentes Obesos a Modificar Estilo de Vida / El Modelo Transteórico para Ayudar Adolescentes con Sobrepeso y Obesidad a Cambiar su Estilo de Vida / The Transtheoretical Model to Assist Lifestyle Modification in Adolescents with Overweight and Obesity

Resumo O número de adolescentes com sobrepeso e obesidade quadriplicou nos últimos trinta anos, gerando possível redução na sobrevida. O tratamento não medicamentoso está relacionado à mudança de estilo de vida, visando a redução de peso. O presente relato de experiência visa descrever uma intervenção interdisciplinar grupal baseada no Modelo Transteórico de Mudança (MTT) para motivar adolescentes com sobrepeso e obesidade a modificar o estilo de vida, avaliar a motivação para a modificação de diferentes comportamentos relacionados à saúde, e explanar estratégias que facilitam a evolução nos estágios de mudança. Participaram deste estudo 13 jovens, com idade média de 16,32 anos (DP = 1,21), sendo cinco do sexo masculino e oito do feminino. Este relato procura apresentar a forma que os processos de mudança podem contribuir no aumento da motivação para mudança do estilo de vida. Ao final da intervenção o grupo apresentou aumento na motivação para praticar exercício físico e regular hábitos alimentares, e perda média de peso.

Resumen El número de adolescentes con sobrepeso y obesidad cuadruplicó en los últimos treinta años y las consecuencias de esa condición pueden llegar a ser la reducción de la sobrevida. El tratamiento sin medicinas se hace por medio del cambio de estilo de vida enfocado a la reducción de peso. El informe expone una intervención interdisciplinar en grupo basada en el Modelo Transteórico (MTT) para motivar adolescentes con sobrepeso y obesidad a modificar su estilo de vida, evaluar su motivación para la modificación de comportamientos relacionados a la salud, y explicar estrategias que facilitan la evolución en las etapas de cambio. En este estudio participaron 13 jóvenes, con edad mediana = 16,32 (DE = 1,21), cinco del sexo masculino y ocho del femenino. Este informe busca demonstrar la forma que los procesos de cambio pueden estimular el aumento de motivación para el cambio del estilo de vida. Al final de la intervención el grupo presentó aumento de la motivación para practicar ejercicio físico regularmente y mejorar hábitos alimenticios, y perdida media del peso inicial.

Abstract The prevalence of overweight and obesity in adolescents has quadrupled over the last 30 years, with significant consequences for life expectancy. The main non-pharmacological intervention for these conditions is lifestyle modification. This experience report describes an interdisciplinary intervention based on the Transtheoretical Model (TTM), delivered to a group of obese adolescents with the aim of increasing motivation for lifestyle modification, evaluating motivation to change health-related behaviors, and discuss techniques to facilitate the evolution through the stages of change. The study involved thirteen participants with a mean age of 16.32 years (SD = 1.21), of whom five were male and a eight, female. The purpose of this report is to describe how the processes for change can increase motivation for lifestyle change in this population. At the end of the intervention, participants showed increased motivation to exercise regularly and improve eating habits, as well as a mean overall weight loss.

Salivary cortisol and metabolic syndrome component's association / Associação do cortisol salivar com os componentes da síndrome metabólica

ABSTRACT Background: Actually the lifestyle exposes the population to several risk factors related to alimentary habits and less physical activity that contributes to chronic diseases appearance worldwide. Aim: To analyze the association between salivary cortisol and the components of metabolic syndrome. Methods: This is a cross-sectional study. As part of it, 28 individuals aged 30-59 years presenting three or more of the following findings: CA: ≥88 cm for women and ≥102 cm for men; SBP>130 mmHg and DBP>85 mmHg; GL>100 mg/dl; TG>150 mg/dl; HDL<40 mg/dl for men and <50 mg/dl for women. Was performed analysis of salivary cortisol (by radioimmunoassay) from 25 salivary samples collected throughout the day, for evaluating changes in the circadian rhythm of this hormone (8AM, noon and 8PM). Results: 28 evaluated individuals had a mean age of 51.9±7.5 years, mostly women (64.3%) and a mean of BMI 33.6±3.2 kg/m². The cortisol level from the 8AM averaged 18.7±4.8 ng/dlL. Individuals with FPG>110mg/dl, have significantly lower average levels of cortisol than ones with FPG <110 (12.8±5,2 vs. 17.3±4.2). Significant correlations were HOMA vs. WC (r=0,465; p˂0,005) and TG (r=0,473; p˂0,005), WC vs. FG (r=0,446; p˂0,005) and BMI (r=0,730; p˂0.0001); TG vs. HDL (r=0,441 p˂0,005) and FG (r=0,440; p˂0,005). Conclusion: Morning salivary cortisol in subjects with chronically elevated blood glucose can represent a downregulation of the hypothalamic-pituitary adrenal axis. This is an important finding not yet well investigated.

RESUMO Racional: Atualmente o estilo de vida expõe a população a diversos fatores de risco relacionados a hábitos alimentares e à inatividade física, contribuindo para o surgimento de doenças crônicas. Objetivo: Analisar a associação entre o cortisol salivar e os componentes da síndrome metabólica. Métodos: Estudo transversal com 28 indivíduos, idade entre 30 e 59 anos apresentando três ou mais dos seguintes achados: circunferência abdominal ≥88 cm (mulheres) e ≥102 cm (homens); pressão arterial sistólica >130 mmHg e pressão arterial diastólica >85 mmHg; glicemia >100 mg/dl; triglicerídeo >150 mg/dl; lipoproteína de alta densidade <40 mg/dl (homens) e <50 mg/dl (mulheres). Foram realizadas coletas do cortisol salivar nos seguintes horários 8 h, 12 h e 20 h e analisadas por radioimunoensaio. Resultados: A média de idade foi 51,9±7,5 anos, 64,3% eram mulheres e a média do índice de massa corporal foi 33,6±3,2 kg/m². O nível de cortisol salivar às 8 h teve média de 18,7±4,8 ng/dl. Os indivíduos com glicemia de jejum >110 mg/dl, apresentaram níveis médios de cortisol significativamente menores que os com glicemia de jejum <110 mg/dl (12,8±5,2 vs. 17,3±4,2). As correlações significativas foram HOMA vs. circunferência abdominal (r=0,465; p˂0,005) e triglicerídeos (r=0,473; p˂0,005), circunferência abdominal vs. glicemia de jejum (r=0,446; p˂0,005) e índice de massa corporal (r=0,730; p˂0,0001), triglicerídeos vs. lipoproteína de alta densidade (r=0,441 p˂0,005) e glicemia de jejum (r=0,440; p˂0,005). Conclusão: O cortisol salivar pela manhã, em indivíduos com glicemia cronicamente elevada, pode representar uma contraregulação do eixo hipotálamo-hipófise-adrenal, sendo achado importante e pouco investigado.

Lifestyle Intervention on Metabolic Syndrome and its Impact on Quality of Life: A Randomized Controlled Trial / Intervenção de Estilo de Vida na Síndrome Metabólica e seu Impacto na Qualidade de Vida: Um Estudo Controlado Randomizado

Abstract Background: Lifestyle intervention programs can reduce the prevalence of metabolic syndrome (MetS) and, therefore, reduce the risk for cardiac disease, one of the main public health problems nowadays. Objective: The aim of this study was to compare the effects of three types of approach for lifestyle change programs in the reduction of metabolic parameters, and to identify its impact on the quality of life (QOL) of individuals with MetS. Methods: A randomized controlled trial included 72 individuals with MetS aged 30-59 years. Individuals were randomized into three groups of multidisciplinary intervention [Standard Intervention (SI) - control group; Group Intervention (GI); and Individual Intervention (II)] during 12 weeks. The primary outcome was change in the metabolic parameters, and secondarily, the improvement in QOL measures at three moments: baseline, 3 and 9 months. Results: Group and individual interventions resulted in a significant reduction in body mass index, waist circumference, systolic blood pressure at 3 months and the improvement of QOL, although it was significantly associated with the physical functioning domain. However, these changes did not remain 6 months after the end of intervention. Depression and anxiety were significantly associated with worse QOL, although they showed no effect on the response to intervention. Conclusion: Multidisciplinary intervention, especially in a group, might be an effective and economically feasible strategy in the control of metabolic parameters of MetS and improvement of QOL compared to SI, even in a dose-effect relationship.

Resumo Fundamento: Programas de intervenção em estilo de vida podem reduzir a prevalência de síndrome metabólica (SM) e, portanto, diminuir o risco de doença cardíaca, um dos principais problemas de saúde pública da atualidade. Objetivo: Comparar os efeitos de três tipos de abordagem para programas de mudança no estilo de vida visando à redução dos parâmetros metabólicos, assim como identificar seu impacto na qualidade de vida (QV) de indivíduos com SM. Métodos: Estudo randomizado controlado incluindo 72 indivíduos com SM com idade de 30 a 59 anos, que foram randomizados em três grupos de intervenção multidisciplinar [Intervenção Padrão (IP) - grupo controle; Intervenção em Grupo (IG); e Intervenção Individual (II)] por 12 semanas. O desfecho primário foi a mudança nos parâmetros metabólicos, e o secundário, a melhora nas medidas de QV em três momentos: condição basal, aos 3 e aos 9 meses. Resultados: As intervenções IG e II resultaram em uma significativa redução em índice de massa corporal, circunferência abdominal e pressão arterial sistólica, e em melhoras da QV aos 3 meses, embora significativamente associadas com o domínio 'capacidade funcional'. Tais mudanças, entretanto, não permaneceram 6 meses após o final da intervenção. Depressão e ansiedade associaram-se significativamente com pior QV, embora sem efeito na resposta à intervenção. Conclusão: A intervenção multidisciplinar, em especial em grupo, pode ser uma estratégia efetiva e economicamente possível para controlar os parâmetros metabólicos de SM e melhorar a QV quando comparada à IP, mesmo em uma relação de dose-efeito.

Lifestyle Intervention on Metabolic Syndrome and its Impact on Quality of Life: A Randomized Controlled Trial.

BACKGROUND: Lifestyle intervention programs can reduce the prevalence of metabolic syndrome (MetS) and, therefore, reduce the risk for cardiac disease, one of the main public health problems nowadays. OBJECTIVE: The aim of this study was to compare the effects of three types of approach for lifestyle change programs in the reduction of metabolic parameters, and to identify its impact on the quality of life (QOL) of individuals with MetS. METHODS: A randomized controlled trial included 72 individuals with MetS aged 30-59 years. Individuals were randomized into three groups of multidisciplinary intervention [Standard Intervention (SI) - control group; Group Intervention (GI); and Individual Intervention (II)] during 12 weeks. The primary outcome was change in the metabolic parameters, and secondarily, the improvement in QOL measures at three moments: baseline, 3 and 9 months. RESULTS: Group and individual interventions resulted in a significant reduction in body mass index, waist circumference, systolic blood pressure at 3 months and the improvement of QOL, although it was significantly associated with the physical functioning domain. However, these changes did not remain 6 months after the end of intervention. Depression and anxiety were significantly associated with worse QOL, although they showed no effect on the response to intervention. CONCLUSION: Multidisciplinary intervention, especially in a group, might be an effective and economically feasible strategy in the control of metabolic parameters of MetS and improvement of QOL compared to SI, even in a dose-effect relationship.

Metabolic syndrome and quality of life: a systematic review.

Objectives: to present currently available evidence to verify the association between metabolic syndrome and quality of life. Method: Cochrane Library, EMBASE, Medline and LILACS databases were studied for all studies investigating the association with metabolic syndrome and quality of life. Two blinded reviewers extracted data and one more was chosen in case of doubt. Results: a total of 30 studies were included, considering inclusion and exclusion criteria, which involved 62.063 patients. Almost all studies suggested that metabolic syndrome is significantly associated with impaired quality of life. Some, however, found association only in women, or only if associated with depression or Body Mass Index. Merely one study did not find association after adjusted for confounding factors. Conclusion: although there are a few studies available about the relationship between metabolic syndrome and quality of life, a growing body of evidence has shown significant association between metabolic syndrome and the worsening of quality of life. However, it is necessary to carry out further longitudinal studies to confirm this association and verify whether this relationship is linear, or only an association factor.

Association between metabolic syndrome and quality of life / Associação entre síndrome metabólica e qualidade de vida

AIMS: Despite all progress made in understanding and treating metabolic syndrome, the study of its impact on quality of life is still controversial and not well understood. The aim of this study was to test the hypothesis that metabolic syndrome can be associated with a worse quality of life. MESTHODS: A controlled cross-sectional study included individuals with metabolic syndrome, from the sub-analysis of a randomized clinical trial about lifestyle modification and cardiovascular risk factors, as well as individuals with no metabolic syndrome, attended as outpatients in several clinics at a general university hospital in Southern Brazil. Measurements were made in individual interviews and included data collection, laboratory tests, and application of general scales such as Mini-Mental State Examination and Medical Outcomes Study Short Form, General Health Survey (SF-36). Comparisons of quantitative data used the Student's t test, followed by analysis of covariance or multiple linear regression for adjustment, and correlation coefficient. For categorical data, the Chi-square or Fisher's exact test were used. RESULTS: The study included 229 individuals, 118 metabolic syndrome and 111 no metabolic syndrome. In univariate analysis, metabolic syndrome was significantly associated with lower scores in the social functioning (p<0.001) and role emotional (p=0.019) quality of life domains, and with the Mental Component Summary score of the SF-36 (p=0.013). However, after adjustments for confounding factors, especially body mass index, the significance of these associations was lost. The only significant association between metabolic syndrome and quality of life that has remained after the adjustments was with worse QOL in the role emotional domain, but only in men (p=0.049). CONCLUSIONS: After adjusting for multiple variables, metabolic syndrome was significantly associated with decreased quality of life scores in men in the role emotional domain.

OBJETIVOS: Apesar dos avanços no entendimento e tratamento da síndrome metabólica, o estudo do seu impacto sobre a qualidade de vida é ainda controverso e inconclusivo. O objetivo deste estudo foi testar a hipótese de que a síndrome metabólica estaria associada à piora da qualidade de vida. MÉTODOS: Um estudo transversal controlado incluiu indivíduos com síndrome metabólica, advindos da subanálise de um estudo controlado randomizado sobre modificação de estilo de vida e fatores de risco cardiovascular; e indivíduos sem síndrome metabólica, provenientes de diversos ambulatórios de um hospital geral no sul do Brasil. As medidas foram realizadas em entrevistas individuais, que incluíram coleta de dados demográficos, testes laboratoriais e aplicação do Exame do Estado Mental e o Medical Outcome Study Short Form, General Health Survey (SF-36). Para comparações entre dados quantitativos, foram utilizados teste t de Student, análise de covariância ou regressão linear múltipla para os ajustes dos fatores confundidores, e coeficiente de correlação. Para dados categóricos foi utilizado o qui quadrado ou o Exato de Fisher quando necessário. RESULTADOS: O estudo incluiu 229 indivíduos, sendo 118 com síndrome metabólica e 111 sem síndrome metabólica. A síndrome metabólica foi significativamente associada com baixos escores de qualidade de vida nos domínios funcionamento social (p<0,001) e aspectos emocionais (p=0,019); e com baixos escores no Componente Sumário da Saúde Mental do SF-36 (p=0,013). Entretanto, após ajustes para os fatores confundidores, especialmente índice de massa corporal, a significância dessas associações foi perdida. A única associação significativa que foi mantida entre síndrome metabólica e qualidade de vida após a análise ajustada foi com o domínio aspectos emocionais, embora somente em homens (p=0,049). CONCLUSÕES: Após o ajuste para múltiplas variáveis, a síndrome metabólica foi significativamente associada com diminuição da pontuação para qualidade de vida em homens, no domínio aspectos emocionais.

Asthma treatment in children and adolescents in an urban area in southern Brazil: popular myths and features.

OBJECTIVE: To describe the frequency of popular myths about and features of asthma treatment in children and adolescents in an urban area in southern Brazil. METHODS: The parents or legal guardians of public school students (8-16 years of age) completed a specific questionnaire regarding their understanding of asthma, asthma control, and treatment characteristics. The sample included parents or legal guardians of students with asthma (n = 127) and healthy controls (n = 124). RESULTS: The study involved 251 parents or legal guardians, of whom 127 (68.5%) were the mothers and 130 (51.8%) were White. The mean age of these participants was 38.47 ± 12.07 years. Of the participants in the asthma and control groups, 37 (29.1%) and 26 (21.0%), respectively, reported being afraid of using asthma medications, whereas 61 (48%) and 56 (45.2%), respectively, believed that using a metered dose inhaler can lead to drug dependence. However, only 17 (13.4%) and 17 (13.7%) of the participants in the asthma and control groups, respectively, reported being afraid of using oral corticosteroids. In the asthma group, 55 students (43.3%) were diagnosed with uncontrolled asthma, only 41 (32.3%) had a prescription or written treatment plan, and 38 (29.9%) used asthma medications regularly. CONCLUSIONS: Popular myths about asthma treatment were common in our sample, as were uncontrolled asthma and inappropriate asthma management. Further studies in this field should be conducted in other developing countries, as should evaluations of pediatric asthma treatment programs in public health systems.