Evaluating the relationship between conditional cash transfer programme on preterm births: a retrospective longitudinal study using the 100 million Brazilian cohort.

BACKGROUND: Preterm births increase mortality and morbidity during childhood and later life, which is closely associated with poverty and the quality of prenatal care. Therefore, income redistribution and poverty reduction initiatives may be valuable in preventing this outcome. We assessed whether receipt of the Brazilian conditional cash transfer programme - Bolsa Familia Programme, the largest in the world - reduces the occurrence of preterm births, including their severity categories, and explored how this association differs according to prenatal care and the quality of Bolsa Familia Programme management. METHODS: A retrospective cohort study was performed involving the first live singleton births to mothersenrolled in the 100 Million Brazilian Cohort from 2004 to 2015, who had at least one child before cohort enrollment. Only the first birth during the cohort period was included, but born from 2012 onward. A deterministic linkage with the Bolsa Familia Programme payroll dataset and a similarity linkage with the Brazilian Live Birth Information System were performed. The exposed group consisted of newborns to mothers who received Bolsa Familia from conception to delivery. Our outcomes were infants born with a gestational age < 37 weeks: (i) all preterm births, (ii) moderate-to-late (32-36), (iii) severe (28-31), and (iv) extreme (< 28) preterm births compared to at-term newborns. We combined propensity score-based methods and weighted logistic regressions to compare newborns to mothers who did and did not receive Bolsa Familia, controlling for socioeconomic conditions. We also estimated these effects separately, according to the adequacy of prenatal care and the index of quality of Bolsa Familia Programme management. RESULTS: 1,031,053 infants were analyzed; 65.9% of the mothers were beneficiaries. Bolsa Familia Programme was not associated with all sets of preterm births, moderate-to-late, and severe preterm births, but was associated with a reduction in extreme preterm births (weighted OR: 0.69; 95%CI: 0.63-0.76). This reduction can also be observed among mothers receiving adequate prenatal care (weighted OR: 0.66; 95%CI: 0.59-0.74) and living in better Bolsa Familia management municipalities (weighted OR: 0.56; 95%CI: 0.43-0.74). CONCLUSIONS: An income transfer programme for pregnant women of low-socioeconomic status, conditional to attending prenatal care appointments, has been associated with a reduction in extremely preterm births. These programmes could be essential in achieving Sustainable Development Goals.

Cesarean sections and early-term births according to Robson classification: a population-based study with more than 17 million births in Brazil.

BACKGROUND: Cesarean section (CS) rates are increasing worldwide and are associated with negative maternal and child health outcomes when performed without medical indication. However, there is still limited knowledge about the association between high CS rates and early-term births. This study explored the association between CSs and early-term births according to the Robson classification. METHODS: A population-based, cross-sectional study was performed with routine registration data of live births in Brazil between 2012 and 2019. We used the Robson classification system to compare groups with expected high and low CS rates. We used propensity scores to compare CSs to vaginal deliveries (1:1) and estimated associations with early-term births using logistic regression. RESULTS: A total of 17,081,685 live births were included. Births via CS had higher odds of early-term birth (OR 1.32; 95% CI 1.32-1.32) compared to vaginal deliveries. Births by CS to women in Group 2 (OR 1.50; 95% CI 1.49-1.51) and 4 (OR 1.57; 95% CI 1.56-1.58) showed the highest odds of early-term birth, compared to vaginal deliveries. Increased odds of an early-term birth were also observed among births by CS to women in Group 3 (OR 1.30, 95% CI 1.29-1.31), compared to vaginal deliveries. In addition, live births by CS to women with a previous CS (Group 5 - OR 1.36, 95% CI 1.35-1.37), a single breech pregnancy (Group 6 - OR 1.16; 95% CI 1.11-1.21, and Group 7 - OR 1.19; 95% CI 1.16-1.23), and multiple pregnancies (Group 8 - OR 1.46; 95% CI 1.40-1.52) had high odds of an early-term birth, compared to live births by vaginal delivery. CONCLUSIONS: CSs were associated with increased odds of early-term births. The highest odds of early-term birth were observed among those births by CS in Robson Groups 2 and 4.

Differences in risk factors for incident and recurrent preterm birth: a population-based linkage of 3.5 million births from the CIDACS birth cohort.

BACKGROUND: Preterm birth (PTB) is a syndrome resulting from a complex list of underlying causes and factors, and whether these risk factors differ in the context of prior PTB history is less understood. The aim of this study was to explore whether PTB risk factors in a second pregnancy were different in women with versus without previous PTB. METHODS: We conducted a population-based cohort study using data from the birth cohort of the Center for Data and Knowledge Integration for Health (CIDACS) for the period 2001 to 2015. We used longitudinal transition models with multivariate logistic regression to investigate whether risk factors varied between incident and recurrent PTB. RESULTS: A total of 3,528,050 live births from 1,764,025 multiparous women were analyzed. We identified different risk factors (Pdifference <0.05) between incident and recurrent PTB. The following were associated with an increased chance for PTB incidence, but not recurrent: household overcrowding (OR 1.09), maternal race/ethnicity [(Black/mixed-OR 1.04) and (indigenous-OR 1.34)], young maternal age (14 to 19 years-OR 1.16), and cesarean delivery (OR 1.09). The following were associated with both incident and recurrent PTB, respectively: single marital status (OR 0.85 vs 0.90), reduced number of prenatal visits [(no visit-OR 2.56 vs OR 2.16) and (1 to 3 visits-OR 2.44 vs OR 2.24)], short interbirth interval [(12 to 23 months-OR 1.04 vs OR 1.22) and (<12 months, OR 1.89, 95 vs OR 2.58)], and advanced maternal age (35-49 years-OR 1.42 vs OR 1.45). For most risk factors, the point estimates were higher for incident PTB than recurrent PTB. CONCLUSIONS: The risk factors for PTB in the second pregnancy differed according to women's first pregnancy PTB status. The findings give the basis for the development of specific prevention strategies for PTB in a subsequent pregnancy.

Factors associated with low birth weight at term: a population-based linkage study of the 100 million Brazilian cohort.

BACKGROUND: Factors associated with low birth weight at term (TLBW), a proxy for intrauterine growth restriction (IUGR), are not well-elucidated in socioeconomically vulnerable populations. This study aimed to identify the factors associated with TLBW in impoverished Brazilian women. METHODS: Records in the 100 Million Brazilian Cohort database were linked to those in the National System of Information on Live Births (SINASC) to obtain obstetric, maternal, birth and socioeconomic data between 2001 and 2015. Multivariate logistic regression was performed to investigate associations between variables of exposure and TLBW. RESULTS: Of 8,768,930 term live births analyzed, 3.7% presented TLBW. The highest odds of TLBW were associated with female newborns (OR: 1.49; 95% CI: 1.47-1.50), whose mothers were black (OR: 1.20; 95% CI: 1.18-1.22), had a low educational level (OR: 1.57; 95% CI: 1.53-1.62), were aged ≥35 years (OR: 1.44; 95% CI: 1.43-1.46), had a low number of prenatal care visits (OR: 2.48; 95% CI: 2.42-2.54) and were primiparous (OR: 1.62; 95% CI: 1.60-1.64). Lower odds of TLBW were found among infants whose mothers lived in the North, Northeast and Center-West regions of Brazil compared to those in the South. CONCLUSION: Multiple aspects were associated with TLBW, highlighting the need to comprehensively examine the mechanisms underlying these factors, especially in more vulnerable Brazilian populations, in order to contribute to the elaboration of health policies and promote better conditions of life for poor and extremely poor mothers and children.

Impact of cash transfer programs on birth and child growth outcomes: systematic review.

To investigate the impact of cash transfer (CTs) on birth outcomes, including birth weight, low birth weight and prematurity, as well as child physical growth were included, as assessed by anthropometric indices in children under five years of age. Searching was performed using the PubMed/Medline, Embase, LILACS, Cochrane Library, Scopus and Web of Science databases. Quantitative observational, experimental and quasi-experimental. Eleven studies were included in the review. The majority (81.8%) were carried out in low-and middle-income countries and most involved conditional CTs (63.6%). Four were clinical trials and seven were observational studies. Conditional CTs were found to be associated with a reduction in height-for-age (-0.14; 95%CI -0.27, -0.02); (OR 0.85; 95%CI 0.77-0.94); (OR = 0.44; 95%CI 0.19-0.98), a significantly reduced chance of low weight-for-age (OR = 0.16; 95%CI -0.11-0.43), low weight-for-height (OR = -0.68; 95%CI -1.14, -0.21), and low weight-for-age (OR = 0.27; 95%CI 0.10; 0.71). Unconditional CTs were associated with reduced birth weight (RR = 0.71; 95%CI 0.63-0.81; p < 0.0001) and preterm births (RR = 0.76; 95%CI 0.69-0.84; p < 0.0001). Conditional CTs can positively influence birth outcomes and child growth.

Participation in Conditional Cash Transfer Program During Pregnancy and Birth Weight-Related Outcomes.

Importance: There is limited evidence of the association of conditional cash transfers, an important strategy to reduce poverty, with prevention of adverse birth-related outcomes. Objective: To investigate the association between receiving benefits from the Bolsa Família Program (BFP) and birth weight indicators. Design, Setting, and Participants: This cohort study used a linked data resource, the Centro de Integracao de Dados e Conhecimentos Para Saude (CIDACS) birth cohort. All live-born singleton infants born to mothers registered in the cohort between January 2012 and December 2015 were included. Each analysis was conducted for the overall population and separately by level of education, self-reported maternal race, and number of prenatal appointments. Data were analyzed from January 3 to April 24, 2023. Exposure: Live births of mothers who had received BFP until delivery (for a minimum of 9 months) were classified as exposed and compared with live births from mothers who did not receive the benefit prior to delivery. Main Outcomes and Measures: Low birth weight (LBW), birth weight in grams, and small for gestational age (SGA) were evaluated. Analytical methods used included propensity score estimation, kernel matching, and weighted logistic and linear regressions. Race categories included Parda, which translates from Portuguese as "brown" and is used to denote individuals whose racial background is predominantly Black and those with multiracial or multiethnic ancestry, including European, African, and Indigenous origins. Results: A total of 4 277 523 live births (2 085 737 females [48.8%]; 15 207 among Asian [0.4%], 334 225 among Black [7.8%], 29 115 among Indigenous [0.7%], 2 588 363 among Parda [60.5%], and 1 310 613 among White [30.6%] mothers) were assessed. BFP was associated with an increase of 17.76 g (95% CI, 16.52-19.01 g) in birth weight. Beneficiaries had an 11% lower chance of LBW (odds ratio [OR], 0.89; 95% CI, 0.88-0.90). BFP was associated with a greater decrease in odds of LBW among subgroups of mothers who attended fewer than 7 appointments (OR, 0.85; 95% CI, 0.84-0.87), were Indigenous (OR, 0.73; 95% CI, 0.61-0.88), and had 3 or less years of education (OR, 0.76; 95% CI, 0.72-0.81). There was no association between BFP and SGA, except among less educated mothers, who had a reduced risk of SGA (OR, 0.83; 95% CI, 0.79-0.88). Conclusions and Relevance: This study found that BFP was associated with increased birth weight and reduced odds of LBW, with a greater decrease in odds of LBW among higher-risk groups. These findings suggest the importance of maintaining financial support for mothers at increased risk of birth weight-related outcomes.

Recurrence of preterm births: A population-based linkage with 3.5 million live births from the CIDACS Birth Cohort.

OBJECTIVE: To investigate the recurrence of preterm birth (PTB) among the poorest half of the Brazilian population. METHODS: A population-based retrospective study was conducted in Brazil with the live births of multiparous women extracted from the CIDACS Birth Cohort between 2001 and 2015. We used multivariate logistic regression to estimate the odds of recurrent PTB in second and third births. RESULTS: A total of 3 528 050 live births from 1 764 025 multiparous women were analyzed. The adjusted odds for the occurrence of a PTB given a previous PTB was 2.58 (95% confidence interval [CI] 2.53-2.62). Lower gestational age increased the odds of a subsequent PTB (<28 weeks: adjusted OR [aOR] 3.61, 95% CI 3.41-3.83; 28-31 weeks: aOR 3.34, 95% CI 3.19-3.49; and 32-36 weeks: aOR 2.42, 95% CI 2.38-2.47). Women who had two previous PTBs were at high risk of having a third (aOR 4.98, 95% CI 4.70-5.27). Recurrence of PTB was more likely when the inter-birth interval was less than 12 months. CONCLUSION: In Brazil, a middle-income country, women with a previous PTB had an increased risk of a subsequent one. This association was affected by gestational age, the number of PTBs, severity of previous PTBs, and a short interval between births.

Evaluating the effect of Bolsa Familia, Brazil's conditional cash transfer programme, on maternal and child health: A study protocol.

BACKGROUND: Conditional Cash Transfer Programs have been developed in Latin America in response to poverty and marked social inequalities on the continent. In Brazil, the Bolsa Familia Program (BFP) was implemented to alleviate poverty and improve living conditions, health, and education for socioeconomically vulnerable populations. However, the effect of this intervention on maternal and child health is not well understood. METHODS: We will evaluate the effect of BFP on maternal and child outcomes: 1. Birth weight; 2. Preterm birth; 3. Maternal mortality; and 4. Child growth. Dynamic retrospective cohort data from the 100 Million Brazilian Cohort (2001 to 2015) will be linked to three different databases: Live Birth Information System (2004 to 2015); Mortality Information System (2011 to 2015); and Food and Nutritional Surveillance System (2008 to 2017). The definition of exposure to the BFP varies according to the outcome studied. Those who never received the benefit until the outcome or until the end of the follow-up will be defined as not exposed. The effects of BFP on maternal and child outcomes will be estimated by a combination of propensity score-based methods and weighted logistic regressions. The analyses will be further stratified to reflect changes in the benefit entitlement before and after 2012. DISCUSSION: Harnessing a large linked administrative cohort allows us to assess the effect of the BFP on maternal and child health, while considering a wide range of explanatory and confounding variables.

Cloth masks in public places: an essential intervention to prevent COVID-19 in Brazil. / Máscaras de tecido em locais públicos: intervenção essencial na prevenção da COVID-19 no Brasil.

There is increasing evidence that the use of masks is an indispensable protective measure against COVID-19, given the high transmissibility of the new coronavirus through the respiratory system, including by asymptomatic individuals. The use of cloth masks in public places has been established as a protective measure to be adopted alongside social distancing and hand hygiene. This narrative review aims to systematize the scientific evidence that informs the widespread use of cloth masks as a preventive measure against COVID-19 and to describe the evolution of positions contrary to or in favor of its use outside the home, in view of the advance of the new coronavirus pandemic globally. The scientific articles, technical notes, governmental decrees and other documents analyzed indicate that widespread use of masks has the potential to reduce the spread of the new coronavirus. We recommend that the Brazilian government adopt strategies to increase the supply of reusable cloth masks to the public, especially to vulnerable populations and to support studies on the impact of this measure to control the pandemic in the country. Finally, it is imperative to ensure that use of masks does not exacerbate stigmatization of racial groups that already face prejudice.

Acumulam-se evidências de que o uso de máscaras é uma medida indispensável de proteção à COVID-19, devido ao alto poder de transmissão do novo coronavírus por via respiratória, inclusive por indivíduos assintomáticos. Por sua vez, o uso das máscaras de tecido em locais públicos tem se consolidado como medida adicional de proteção às medidas de distanciamento social e higienização das mãos. Objetivou-se sistematizar as evidências científicas que justificam o amplo uso de máscaras de tecido como prevenção à COVID-19 e descrever a evolução dos posicionamentos contrários ou favoráveis ao seu uso em ambientes extradomiciliares, diante do avanço da pandemia do novo coronavírus pelo mundo. A triagem de artigos e documentos oficiais do Brasil e de outros países indica que o uso de máscaras em locais públicos tornou-se uma intervenção essencial graças ao potencial de reduzir a velocidade de propagação do novo coronavírus. Recomenda-se que o poder público adote estratégias para aumentar a oferta deste produto e fomente estudos para avaliação do impacto da medida no controle da pandemia no Brasil. É imperativo assegurar disponibilidade de máscaras a grupos socioeconomicamente desfavorecidos e garantir que determinados grupos raciais não sejam estigmatizados diante do uso de máscaras em ambientes extradomiciliares.

Abortion and the COVID-19 pandemic: insights for Latin America.

The COVID-19 pandemic may accentuate existing problems, hindering access to legal abortion, with a consequent increase in unsafe abortions. This scenario may be even worse in low- and middle-income countries, especially in Latin America, where abortion laws are already restrictive and access to services is already hampered. Our objective was to understand how different countries, with an emphasis on Latin Americans, have dealt with legal abortion services in the context of the COVID-19. Thus, we conducted a narrative review on abortion and COVID-19. The 75 articles included, plus other relevant references, indicate that the pandemic affects sexual and reproductive health services by amplifying existing problems and restricting access to reproductive rights, such as legal abortion. This impact may be even stronger in low- and middle-income countries, especially in Latin America, where access to legal abortion is normally restricted. The revision of sources in this article underlines the urgent need to maintain legal abortion services, both from women's perspective, in support of their reproductive rights, but also from that of the international commitment to achieving the Millennium Development Goals. Thereby, Latin American countries must place reproductive rights as a priority on their agendas and adapt legislation to accommodate alternative models of abortion care. Furthermore, our results underscore the need for clear information on the functioning of sexual and reproductive health services as essential for understanding the impact of the pandemic on legal abortion and to identify the groups most affected by the changes.

The effect of laboratory testing on COVID-19 monitoring indicators: an analysis of the 50 countries with the highest number of cases. / O efeito da testagem laboratorial nos indicadores de acompanhamento da COVID-19: uma análise dos 50 países com maior número de casos.

OBJECTIVE: To analyse how testing the population influences the health indicators used to monitor the COVID-19 pandemic in the 50 countries with the highest number of diagnosed cases. METHODS: This was an ecological study using secondary data retrieved on 8/19/2020. Cumulative incidence, mortality rate, case-fatality rate, and proportion of positive tests were calculated. The data were described and presented graphically, with their respective Spearman Correlation Coefficients. RESULTS: The testing rate varied enormously between countries. Cumulative incidence and the proportion of positive tests were correlated with the number of tests, while the mortality rate and case-fatality rate showed low correlation with this indicator. CONCLUSION: Most countries do not test enough to ensure adequate monitoring of the pandemic, and this is reflected in the quality of the indicators. Expanding the number of tests is essential, but it needs to be accompanied by other measures, such as isolation of diagnosed cases and contact tracing.

Risk of mortality for small newborns in Brazil, 2011-2018: A national birth cohort study of 17.6 million records from routine register-based linked data.

BACKGROUND: Preterm birth (<37 weeks), low birth weight (LBW,<2500g), and small for gestational age (SGA,<10th centile of birth weight for gestational age and sex) are markers of newborn vulnerability with a high risk of mortality. We estimated the prevalence of phenotypes combining these three markers and quantified the mortality risk associated with them. METHODS: Population-based cohort study using routine register-based linked data on all births and deaths in Brazil from January 1, 2011, to December 31, 2018. We estimated the prevalence of preterm, LBW, and SGA individually and for phenotypes combining these characteristics. The mortality risk associated with each phenotype: early neonatal, late neonatal, neonatal, post-neonatal, infant, 1-4 years, and under five years was quantified using mortality rates and hazard ratios (HRs) with 95% confidence interval (CI) were estimated using Cox proportional hazard models. FINDINGS: 17,646,115 live births were included. Prevalence of preterm birth, LBW and SGA were 9.4%, 9.6% and 9.2%, respectively. Neonatal mortality risk was 16-fold (HR=15.9; 95% CI:15.7-16.1) higher for preterm compared to term, 3 times higher (HR=3.4; (95% CI:3.3-3.4) for SGA compared to adequate for gestational age (AGA), and >25 times higher for LBW (HR=25.8; (95% CI:25.5-26.1) compared to normal birth weight (NBW). 18% of all live births were included in one of the small vulnerable newborn phenotypes. Of those 8.2% were term-SGA (4.7%NBW, 3.5%LBW), 0.6% were term-AGA-LBW, 8.3% preterm-AGA (3.8%NBW, 4.5%LBW) and 1.0% preterm-SGA-LBW. Compared to term-AGA-NBW, the highest mortality risk was for preterm-LBW phenotypes (HR=36.2(95%CI 35.6-36.8) preterm-AGA-LBW, HR=62.0(95%CI 60.8-63.2) preterm-SGA-LBW). The increased mortality risk associated with vulnerable newborn phenotypes was highest in the first month of life, with attenuated but continued high risk in the post-neonatal period and 1-4 years of age. INTERPRETATION: Our findings support the value of using more detailed phenotypes to identify those at highest risk. More granular data can inform care at the individual level, advance research, especially for prevention, and accelerate progress towards global targets such as the Sustainable Development Goals. FUNDING: Wellcome Trust.

Methods to evaluate COVID-19 vaccine effectiveness, with an emphasis on quasi-experimental approaches. / Métodos para avaliação da efetividade de vacinas para COVID-19 com ênfase em abordagens quase-experimentais.

The evaluation of vaccine effectiveness is conducted with real-world data. They are essential to monitor the performance of vaccination programmes over time, and in the context of the emergence of new variants. Until now, the effectiveness of COVID-19 vaccines has been assessed based on classic methods, such as cohort and test-negative case-control studies, which may often not allow for adequate control of inherent biases in the assignment of vaccination campaigns. The aim of this review was to discuss the study designs available to evaluate vaccine effectiveness, highlighting quasi-experimental studies, which seek to mimic randomized trials, by introducing an exogenous component to allocate to treatment, in addition to the advantages, limitations, and applicability in the context of Brazilian data. The use of quasi-experimental approaches, such as interrupted time series, difference-in-differences, propensity scores, instrumental variables, and regression discontinuity design, are relevant due to the possibility of providing more accurate estimates of COVID-19 vaccine effectiveness. This is especially important in scenarios such as the Brazilian, which characterized by the use of various vaccines, with the respective numbers and intervals between doses, applied to different age groups, and introduced at different times during the pandemic.

A avalição da efetividade de vacinas é feita com dados do mundo real e é essencial para monitorar o desempenho dos programas de vacinação ao longo do tempo bem como frente a novas variantes. Até o momento, a avaliação da efetividade das vacinas para COVID-19 tem sido baseada em métodos clássicos como estudos de coorte e caso controle teste-negativo, que muitas vezes podem não permitir o adequado controle dos vieses intrínsecos da alocação das campanhas de vacinação. O objetivo dessa revisão foi discutir os desenhos de estudo disponíveis para avaliação de efetividade das vacinas, enfatizando os estudos quase-experimentais, que buscam mimetizar os estudos aleatorizados ao introduzir um componente exógeno para atribuição ao tratamento, bem como suas vantagens, limitações e aplicabilidade no contexto dos dados brasileiros. O emprego de métodos quase-experimentais, incluindo as séries temporais interrompidas, o método de diferença em diferenças, escore de propensão, variáveis instrumentais e regressão descontínua, são relevantes pela possibilidade de gerar estimativas mais acuradas da efetividade de vacinas para COVID-19 em cenários como o brasileiro, que se caracteriza pelo uso de várias vacinas, com respectivos número e intervalos entre doses, aplicadas em diferentes faixas etárias e em diferentes momentos da pandemia.

Feeding practices of low birth weight Brazilian infants and associated factors.

OBJECTIVE: To characterize complementary feeding and to analyze the influence of individual and contextual factors on dietary practices of low birth weight infants. METHODS: This cross-sectional study included 2,370 low birth weight infants aged 6 to 12 months included in the Breastfeeding Prevalence Survey in Brazilian Municipalities (2008), which covered the 26 state capitals, the Federal District and 37 municipalities. Dietary practices were assessed using two indicators: I) dietary diversity, characterized by the consumption of five food groups: meat, beans, vegetables, fruit and milk; II) consumption of ultra-processed foods, characterized by the ingestion of at least one of the following foods on the day prior to the survey: soda, or processed juice, or cookie, cracker and crisps. The covariates of interest were the socioeconomic characteristics of infants, mothers and health services. The contextual factor was the "municipal prevalence of child undernutrition." The individualized effect of the study factors on outcomes was assessed by multilevel Poisson regression. RESULTS: Approximately 59% of infants consumed ultra-processed foods, while 29% had diverse feeding. Mothers living in municipalities with child undernutrition prevalence below 10%, with higher education and working outside the home were more likely to offer dietary diversity. Consumption of ultra-processed foods was higher among infants living in municipalities with child undernutrition prevalence below 10%, whose mothers were younger and multiparous. CONCLUSIONS: The low prevalence of diverse feeding combined with the high prevalence of ultra-processed food consumption characterizes the low quality of feeding of low birth weight Brazilian infants. Individual and contextual factors impact the feeding quality of this population, suggesting the need for effective strategies to increase the consumption of fresh and minimally processed foods and decrease the consumption of ultra-processed foods by this vulnerable population.

Social distancing measures to control the COVID-19 pandemic: potential impacts and challenges in Brazil. / Medidas de distanciamento social no controle da pandemia de COVID-19: potenciais impactos e desafios no Brasil.

The COVID-19 pandemic has challenged researchers and policy makers to identify public safety measures forpreventing the collapse of healthcare systems and reducingdeaths. This narrative review summarizes the available evidence on the impact of social distancing measures on the epidemic and discusses the implementation of these measures in Brazil. Articles on the effect of social distancing on COVID-19 were selected from the PubMed, medRXiv and bioRvix databases. Federal and state legislation was analyzed to summarize the strategies implemented in Brazil. Social distancing measures adopted by the population appear effective, particularly when implemented in conjunction with the isolation of cases and quarantining of contacts. Therefore, social distancing measures, and social protection policies to guarantee the sustainability of these measures, should be implemented. To control COVID-19 in Brazil, it is also crucial that epidemiological monitoring is strengthened at all three levels of the Brazilian National Health System (SUS). This includes evaluating and usingsupplementary indicators to monitor the progression of the pandemic and the effect of the control measures, increasing testing capacity, and making disaggregated notificationsand testing resultstransparentand broadly available.

A pandemia de COVID-19 tem desafiado pesquisadores e gestores a encontrar medidas de saúde pública que evitem o colapso dos sistemas de saúde e reduzam os óbitos. Esta revisão narrativa buscou sistematizar as evidências sobre o impacto das medidas de distanciamento social na epidemia de COVID-19 e discutir sua implementação no Brasil. Foram triados artigos sobre o efeito do distanciamento social na COVID-19 no PubMed, medRXiv e bioRvix, e analisados atos do poder público nos níveis federal e estadual para sumarizar as estratégias implementadas no Brasil. Os achados sugerem que o distanciamento social adotado por população é efetivo, especialmente quando combinado ao isolamento de casos e à quarentena dos contatos. Recomenda-se a implementação de medidas de distanciamento social e de políticas de proteção social para garantir a sustentabilidade dessas medidas. Para o controle da COVID-19 no Brasil, é imprescindível que essas medidas estejam aliadas ao fortalecimento do sistema de vigilância nos três níveis do SUS, que inclui a avaliação e uso de indicadores adicionais para monitorar a evolução da pandemia e o efeito das medidas de controle, a ampliação da capacidade de testagem, e divulgação ampla e transparente das notificações e de testagem desagregadas.

[Determinants of exclusive breastfeeding in low birthweight infants under six months of age]. / Determinantes do aleitamento materno exclusivo em lactentes menores de seis meses nascidos com baixo peso.

The study aimed to assess factors associated with exclusive breastfeeding in low birthweight infants under six months of age in 64 Brazilian municipalities. This cross-sectional study included the 2,745 low birth weight infants under six months of age in the Survey on Prevalence of Breastfeeding (2008) in Brazilian municipalities. The outcome was exclusive breastfeeding. Individual determinants included socioeconomic characteristics (infants' age and sex), maternal characteristics (age bracket, work status, and parity), and characteristics of health services (birth in a Child-Friendly Hospital; place of outpatient follow-up; type of delivery). Two contextual determinants were also included: "number of Human Milk Banks per municipality per 10,000 live births" and "municipal human development index". The individualized effect of the study factor on the outcome was assessed by multilevel Poisson regression with level of significance under 5%. Exclusive Breastfeeding was more prevalent in low birth weight infants whose mothers were 20-35 years of age, who were not working away from home or were on maternity leave, who had given birth in a Child-Friendly Hospital, and who lived in municipalities with more human milk banks per 10,000 live births. The result of the positive and independent effect of strategies that were already part of the National Breastfeeding Policy (birth in a Child-Friendly Hospital, living in a municipality with more human milk banks, and adopting laws that guarantee maternity leave) on exclusive breastfeeding in low birth weight infants points to the need to expand the coverage of these measures in order to meet the breastfeeding targets proposed by the World Health Organization.

Objetivou-se avaliar os fatores associados ao aleitamento materno exclusivo (AME) em lactentes com baixo peso ao nascer, menores de seis meses e residentes em 64 municípios brasileiros. Este estudo transversal incluiu os 2.745 lactentes com baixo peso ao nascer menores de seis meses da Pesquisa de Prevalência de Aleitamento Materno (2008) em municípios brasileiros. O desfecho foi "AME". Os determinantes individuais corresponderam às características socioeconômicas dos lactentes (idade; sexo), das mães (faixa etária; situação de trabalho; paridade) e dos serviços de saúde (nascimento em Hospital Amigo da Criança; local de acompanhamento ambulatorial; tipo de parto). Dois determinantes contextuais foram incluídos: "número de bancos de leite humano por município por 10 mil nascidos vivos", e "IDH do município". O efeito individualizado do fator de estudo sobre o desfecho foi avaliado mediante regressão de Poisson com estrutura multinível, considerando-se associação significante quando p < 5%. O AME foi mais prevalente entre lactentes com baixo peso ao nascer cujas mães tinham de 20-35 anos, não trabalhavam fora ou estavam em licença maternidade; nos que nasceram em Hospital Amigo da Criança e que residiam em municípios com maior número de bancos de leite humano por 10 mil nascidos vivos. O resultado do efeito positivo e independente de estratégias que já integram a Política Nacional de Aleitamento Materno (nascer em Hospital Amigo da Criança, residir em município com maior disponibilidade de bancos de leite humano e adotar leis que garantam a licença maternidade) sobre o AME em lactentes com baixo peso ao nascer, aponta para a necessidade de expansão da cobertura dessas ações com vistas ao cumprimento das metas de aleitamento propostas pela Organização Mundial da Saúde.

El objetivo fue evaluar los factores asociados a la lactancia materna exclusiva en lactantes con bajo peso al nacer menores de seis meses, residentes en 64 municipios brasileños. Este estudio transversal incluyó a los 2.745 lactantes con bajo peso al nacer, menores de seis meses, de la Encuesta de Prevalencia de Lactancia Materna (2008) en municipios Brasileños. El desenlace fue "lactancia materna exclusiva". Los determinantes individuales correspondieron a las características socioeconómicas de los lactantes (edad; sexo), de las madres (franja etaria; situación laboral; igualdad) y de los servicios de salud (nacimiento en un Hospital Amigo da Criança; lugar de seguimiento ambulatorio; tipo de parto). Se incluyeron dos determinantes contextuales: "número de bancos de leche humana por municipio por 10 mil nacidos vivos", e "IDH del municipio". El efecto individualizado del factor de estudio sobre el desenlace fue evaluado mediante regresión de Poisson con estructura multinivel, considerándose una asociación significante cuando p < 5%. El lactancia materna exclusiva fue más prevalente entre lactantes con bajo peso al nacer, cuyas madres tenían de 20-35 años, no trabajaban fuera o estaban con licencia de maternidad; en quienes nacieron en un Hospital Amigo da Criança y que residían en municipios con mayor número de bancos de leche humana por 10 mil nacidos vivos. El resultado del efecto positivo e independiente de estrategias, que ya integran la Política Nacional de Lactancia Materna (nacer en Hospital Amigo da Criança, residir en municipio con mayor disponibilidad de bancos de leche humana y adoptar leyes que garanticen la baja por maternidad), sobre el lactancia materna exclusiva en lactantes con bajo peso al nacer, apunta la necesidad de expansión de la cobertura de esas acciones con vistas al cumplimiento de las metas de lactancia propuestas por la Organización Mundial de la Salud.

Factors associated with the evolution of weight of children in a supplementary feeding program. / Fatores associados à evolução do peso de crianças em programa de suplementação alimentar.

Identifying the influence of socioeconomic, care, and feeding factors on children's nutritional status is important for the evaluation and targeting of public policies based on nutritional interventions. We investigated the sociodemographic and biological factors associated with children aged 6 to 23 months leaving the low weight-for-age condition (weight-for-age z-score < -2) during their participation in a supplementary feeding program (SFP). This is a cohort study with 327 low-income children living in the inland of the state of São Paulo, who joined the SFP with low weight-for-age when they were six months old. The dependent variable was "maintained low weight-for-age during participation in the program" (dichotomous), and the independent variables related to: 1) maternal characteristics: marital status, schooling, age, and work situation; 2) child characteristics: being weaned, gender, birth weight, and age at weighing. We used a multiple multilevel logistic regression for the modeling. Factors positively associated with children's weight gain were higher age at weighing (OR = 1.20; 95%CI 1.08 - 1.34; p = 0.001); higher birth weight (OR = 1.0011; 95%CI 1.0001 - 1.0019; p = 0.022), and being weaned when joining the program (OR = 0.20; 95%CI 0.08 - 0.52; p = 0.001). Actions focused on promoting appropriate birth weight and breastfeeding, and on adequate and timely introduction to healthy complementary feeding are important strategies to maximize the effects of the SFP on weight gain in the first two years of life of children from low-income families.

Identificar a influência dos fatores socioeconômicos, dos cuidados e da alimentação sobre o estado nutricional infantil são importantes para avaliação e direcionamento de políticas públicas baseadas em intervenções nutricionais. Foram investigados os fatores sociodemográficos e biológicos associados à saída de crianças da faixa de baixo peso-para-idade (escore z de peso-para-idade < -2), nas idades de 6 a 23 meses, durante sua participação em programa de suplementação alimentar (PSA). Trata-se de estudo de coorte com 327 crianças de baixa renda residentes no interior do estado de São Paulo, que ingressaram no PSA aos 6 meses de idade com baixo peso-para-idade. A variável dependente foi "permanecer com baixo ­peso-para-idade durante a participação no programa" (dicotômica), e as independentes referem-se a: 1) características maternas: condição conjugal, escolaridade, idade, situação de trabalho; 2) características das crianças: estar desmamada, sexo, peso ao nascer e idade nas pesagens. Foram realizadas modelagens com regressão logística múltipla multinível. Maior idade da criança na pesagem (OR = 1,20; IC95% 1,08 - 1,34; p = 0,001), maior peso ao nascer (OR = 1,0011; IC95% 1,0001 - 1,0019; p = 0,022) e estar desmamada ao ingressar (OR = 0,20; IC95% 0,08 - 0,52; p = 0,001) se associaram positivamente ao ganho de peso das crianças. Ações focadas na promoção do peso adequado ao nascer e do aleitamento materno e na introdução adequada e oportuna da alimentação complementar saudável são estratégias importantes para maximizar o efeito de PSA no ganho de peso nos primeiros dois anos de vida em crianças de famílias de baixa renda.

Factors associated with the double burden of malnutrition among adolescents, National Adolescent School-Based Health Survey (PENSE 2009 and 2015).

OBJECTIVE: To assess the sociodemographic factors associated with the double burden of malnutrition (DBM) among Brazilian adolescents. METHODS: This was a descriptive study based on data from 59,637 and 10,770 students who participated in the National Adolescent School-Based Health Survey (PeNSE), 2009 and 2015 editions, respectively. Weight and height measurements were obtained to evaluate nutritional status. DBM was classified as follows: adolescents with high BMI-for-age and low height-for-age (BMI/A: Z-score > +1 and H/A: Z-score < -2). Sociodemographic data on the participants were also collected. A multinomial logistic regression analysis was used to detect associations of interest. RESULTS: The prevalence of DBM in the 2009 and 2015 editions of the PeNSE was 0.4% and 0.3%, respectively. In the 2009 edition, the chance of DBM was lower among boys (OR = 0.60; 95% CI = 0.45-0.81) and higher among those over 14 years old (OR = 2.40; 95% CI = 1.80-3.20), living in the country's north and northeast regions (OR = 2.01; 95% CI = 1.49-2.84), and from families with a low maternal education level (OR = 1.48; 95% CI = 1.07-2.04). In the 2015 edition, no significant associations were found regarding the DBM outcome. CONCLUSION: The results indicate the presence of socioeconomic inequalities in the occurrence of DBM in the 2009 edition of the PeNSE. Simultaneous interventions in the area of equity are necessary to prevent the advancement of nutrition-related problems.

Correction: Factors associated with the double burden of malnutrition among adolescents, National Adolescent School-Based Health Survey (PENSE 2009 and 2015).

[This corrects the article DOI: 10.1371/journal.pone.0218566.].

Evaluation of the Computer-Based Intervention Program Stayingfit Brazil to Promote Healthy Eating Habits: The Results from a School Cluster-Randomized Controlled Trial.

Interventions via the Internet are promising regarding the promotion of healthy habits among youth. The objective of this study was to evaluate the effect of an adapted version of StayingFit to promote healthy eating habits and the measurement adequacy of anthropometric markers among adolescents. A web school-based 12-month cluster-randomized controlled trial examining 7th to 9th grade students was conducted in twelve schools in Salvador, Bahia, Brazil. The schools' students were randomly distributed into the intervention and control groups. The intervention group participated in StayingFit, an online program designed to encourage and guide healthy eating habits and control body weight. Data on food consumption, anthropometry, physical activity level, and sedentary behavior were collected from all of the students at the beginning of and after the 12-month study. Demographic and socioeconomic data were collected at baseline. The baseline data indicated high rates of overweight (14.4% overweight and 8.5% obese), insufficiently active (87.6%), and sedentary (63.7%). Furthermore, few adolescents regularly consumed fruits (18.8%) and vegetables/legumes (16.4%). Generalized estimating equations (GEEs) were used to evaluate the effect of the intervention. At the end of the follow-up period, students in the intervention group had a 43% increased chance of regularly consuming beans (OR = 1.43, 95% CIs = 1.10-1.86) and a 35% decreased chance of regularly consuming soft drinks (OR = 0.65, 95% CIs = 0.50-0.84). No differences were found between the groups studied with regard to the anthropometric parameters. Despite these modest results, the implementation of a web intervention can be beneficial and help promote positive changes in adolescent eating habits.