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OBJECTIVE: To estimate the prevalence of adverse childhood experiences and identify associated factors. METHODS: A population-based cross-sectional study comprised data from a sample of 3,200 households with 3,566 children under 6 years of age, representative of the state of Ceará, Brazil. A multistage sampling approach was used, with stratification among the state capital, Fortaleza, and the 28 countryside municipalities, in which 160 census tracts were randomly selected, each one with a cluster of 20 households. The outcome variable was structured based on adverse childhood experiences as suggested by the Center for Disease Control and Prevention, according to the number of situations to which the child was exposed: 0-2, 3-5, and 6-9. Ordinal logistic regression multivariate model was applied to assess associations. RESULTS: Among the 3,566 children studied, 89.7% (95%CI 88.7-90.7) were exposed to at least one adverse experience, of which the most prevalent were neglect, and emotional/physical abuse. The main factors associated were maternal advanced age and smoking, paternal absence, low education level of the head of the family, food insecurity and lack of a social support network. CONCLUSION: The study found a high occurrence of adverse early childhood experiences, particularly among preschool children born to mothers of older age, solo, who smoke and in a situation of social and economic vulnerability, including food insecurity, who should be target of control and prevention measures.
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Características da Família , Mães , Feminino , Pré-Escolar , Humanos , Brasil/epidemiologia , Prevalência , Estudos TransversaisRESUMO
BACKGROUND: Physical distancing associated with the COVID-19 pandemic may lead to suboptimal maternal mental health, social support after birth, and infant feeding practices. RESEARCH AIMS: To compare breastfeeding prevalence in participants who were pregnant at a time when strict physical distancing measures were imposed in Fortaleza, the capital of Ceará state, Brazil, with the pre-pandemic breastfeeding levels, and to assess the association of breastfeeding prevalence with maternal common mental disorders, and sociodemographic and health predictors. METHOD: A cross-sectional prospective two-group comparison design using two population-based surveys was carried out in Fortaleza before and after the pandemic. Participants (n = 351) who had a live birth in Fortaleza in July or August 2020, and participants (n = 222) who had a child younger than 12 months in 2017 were surveyed. Crude and adjusted multinomial logistic regressions with robust variance were used to estimate risk ratios and 95% confidence intervals (CI). RESULTS: Similar prevalence of exclusive breastfeeding were observed in 2021 (8.1%) and 2017 (8.5%; p = .790). An increase in predominant (2.2% vs. 13.4%; p < .001) and a decrease in complementary breastfeeding (64.0% vs. 48.4%; p = .037) was observed in 2021, compared to 2017. The prevalence of maternal common mental disorders also increased in 2021 (17.6% vs. 32.5%, p < .001). No statistically significant associations were found between breastfeeding patterns, maternal common mental disorders, and other predictors in 2017 or 2021. CONCLUSIONS: Participants who delivered during the COVID-19 pandemic delayed solid foods introduction and breastfed predominantly longer than participants during the pre-pandemic period. While common mental disorders significantly increased, they were not associated with differences in breastfeeding.
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Aleitamento Materno , COVID-19 , Brasil/epidemiologia , COVID-19/epidemiologia , COVID-19/prevenção & controle , Estudos Transversais , Feminino , Humanos , Lactente , Pandemias , Gravidez , Estudos ProspectivosRESUMO
ABSTRACT Objective: To estimate the prevalence of adverse childhood experiences and identify associated factors. Methods: A population-based cross-sectional study comprised data from a sample of 3,200 households with 3,566 children under 6 years of age, representative of the state of Ceará, Brazil. A multistage sampling approach was used, with stratification among the state capital, Fortaleza, and the 28 countryside municipalities, in which 160 census tracts were randomly selected, each one with a cluster of 20 households. The outcome variable was structured based on adverse childhood experiences as suggested by the Center for Disease Control and Prevention, according to the number of situations to which the child was exposed: 0-2, 3-5, and 6-9. Ordinal logistic regression multivariate model was applied to assess associations. Results: Among the 3,566 children studied, 89.7% (95%CI 88.7-90.7) were exposed to at least one adverse experience, of which the most prevalent were neglect, and emotional/physical abuse. The main factors associated were maternal advanced age and smoking, paternal absence, low education level of the head of the family, food insecurity and lack of a social support network. Conclusion: The study found a high occurrence of adverse early childhood experiences, particularly among preschool children born to mothers of older age, solo, who smoke and in a situation of social and economic vulnerability, including food insecurity, who should be target of control and prevention measures.
RESUMO Objetivo: Estimar a prevalência de experiências adversas na infância e identificar fatores associados. Métodos: O estudo transversal de base populacional compreendeu os dados de uma amostra de 3.200 domicílios com 3.566 crianças menores de seis anos, representativa do estado do Ceará, Brasil. Foi utilizado um processo de amostragem multiestágio, com estratificação entre a capital do estado, Fortaleza, e os 28 municípios do interior, nos quais foram sorteados 160 setores censitários, cada qual com um conglomerado de 20 domicílios. A variável desfecho foi estruturada com base nas situações de experiências adversas na infância sugeridas pelo grupo Centers for Disease Control and Prevention, de acordo com o número de situações a que a criança foi exposta: 0-2, 3-5 e 6-9. O modelo multivariado de regressão logística ordinal foi utilizado para avaliar as associações. Resultados: Das 3.566 crianças estudadas, 89,7% (intervalo de confiança — IC95% 88,7-90,7) foram expostas a pelo menos uma experiência adversa, sendo as mais prevalentes negligência e abuso emocional/físico. Os principais fatores associados às experiências adversas na infância foram a idade materna mais elevada e o tabagismo materno, a ausência paterna, a baixa escolaridade do chefe da família, a insegurança alimentar e a falta de rede de apoio social. Conclusão: O estudo encontrou alta ocorrência de experiências adversas na primeira infância, principalmente entre crianças nascidas de mães de idade mais elevada e tabagistas, sem a presença paterna, e em situação de vulnerabilidade social e econômica, como a insegurança alimentar, que deve ser alvo prioritário de medidas de prevenção e controle.
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BACKGROUND: Globally, children's exposure to digital screens continues to increase and is associated with adverse effects on child health. We aimed to evaluate the association of screen exposure with child communication, gross-motor, fine-motor, problem-solving, and personal-social development scores. METHODS: We conducted a population-based, cross-sectional study with cluster sampling among children 0-60 months of age living in the state of Ceará, Brazil. Child screen time was assessed by maternal report and the World Health Organization (WHO) recommendations were used to define excessive screen time exposure. Child development was assessed with the Brazilian Ages and Stages Questionnaire. Generalized linear regression was used to determine the association of screen exposure with developmental outcomes. We also examined the potential non-linear relationship of screen time with development scores using spline analyses. RESULTS: A total of 3155 children 0-60 months of age had screen time exposure evaluated and 69% percent were identified as exposed to excessive screen time. This percentage of excess screen time increased with child age from 41.7% for children 0-12 months to 85.2% for children 49-60 months. Each additional hour of screen time was associated with lower child communication (standardized mean difference (SMD): -0.03; 95% CI: - 0.04, - 0.02), problem solving (SMD: -0.03; 95% CI: - 0.05, - 0.02) and personal-social (SMD: -0.04; 95% CI: - 0.06, - 0.03) domain scores. CONCLUSIONS: Excess screen time exposure was highly prevalent and independently associated with poorer development outcomes among children under 5 years of age in Ceará, Brazil.
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Desenvolvimento Infantil , Tempo de Tela , Brasil/epidemiologia , Pré-Escolar , Estudos Transversais , Família , Humanos , LactenteRESUMO
BACKGROUND: Adolescent motherhood (AM) remains a public health problem, especially in low and middle income countries, where approximately 95% of these births occur. Evidence from studies with population representativeness about events associated with AM is limited. We assessed the prevalence of AM, as well as its association with Socioeconomic Factors and Obstetric Outcomes. METHODS: A population-based cross-sectional study on maternal and child health of women aged 10 to 49 years, living in the state of Ceará, in northeastern Brazil was carried out to assess the prevalence of AM, as well as its association with Socioeconomic Factors and Obstetric Outcomes. The definition of adolescence used in the study was the one utilized by the WHO. In addition to the interview, data were double-checked according to the information in the government's pregnancy health booklet. Sample-adjusted logistic models to determine the association of socioeconomic factors and AM, as well as the association of AM with obstetric outcomes, with a causal approach to multivariate analyses, were used. RESULTS: The prevalence of adolescent motherhood was 18.6%. Poverty and household crowding were associated with greater chances of AM (p values of 0.038 and < 0.001, respectively), as well as not being in a stable relationship (OR 2.26 (95%CI: 1.67, 3.07), p < 0.001). AM showed a greater chance of not using community health services (p < 0.001), had fewer prenatal consultations (ß - 0.432 (95%CI: - 0.75, - 0.10)) and started prenatal care at a later date (ß 0.38 (95%CI: 0.21, 0.55), p < 0.001)). AM are also less likely to be tested for HIV and more likely to have urinary tract infections. CONCLUSIONS: Interventions aimed at socially-vulnerable adolescents are suggested. However, if pregnant, adolescents should receive proactive and differentiated prenatal care.
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Gravidez na Adolescência , Adolescente , Adulto , Brasil/epidemiologia , Estudos Transversais , Características da Família , Feminino , Humanos , Pessoa de Meia-Idade , Pobreza , Gravidez , Cuidado Pré-Natal , Prevalência , Fatores Socioeconômicos , Adulto JovemRESUMO
OBJECTIVE: To assess the prevalence of child development delay and to identify socioeconomic determinants. STUDY DESIGN: We conducted a population-based cross-sectional study of children 2 to 72 months of age residing in the state of Ceará, Brazil. In total, 3200 households were randomly selected for participation in the study and had child development assessed with the Ages and Stages Questionnaire (ASQ) version 3. Development delay was defined as a score of less than -2 standard deviations below the median of the Brazilian ASQ standard. We present population-level prevalence of delay in five development domains and assess socioeconomic determinants. RESULTS: A total of 3566 children completed the ASQ development assessment of which 9.2% (95% CI: 8.1-10.5) had at least one domain with development delay. The prevalence of delay increased with age in all domains and males were at higher risk for communication, gross motor and personal-social development delays as compared to females (p-values <0.05). We found robust associations of indicators of socioeconomic status with risk of development delay; increasing monthly income and higher social class were associated with reduced risk of delay across all domains (28,2% in the poorest and 21,2% in richest for any delay, p-values <0.05 for all domains). In addition, children in poor households that participated in conditional cash transfer (CCT) programs appeared to have reduced risk of delay as compared to children from households that were eligible, but did not participate, in CCT programs. CONCLUSIONS: There is a relatively high population-level prevalence of development delay in at least one domain among children 0-6 years of age in Ceará, Brazil. Integrated child development, social support, and poverty reduction interventions may reduce the population-level prevalence of development delay in Ceará and similar settings.
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Deficiências do Desenvolvimento/epidemiologia , Brasil/epidemiologia , Criança , Pré-Escolar , Estudos Transversais , Características da Família , Feminino , Humanos , Lactente , Masculino , Prevalência , Fatores de Risco , Fatores Socioeconômicos , Inquéritos e QuestionáriosRESUMO
200 million pre-school age children are not developing properly. Delays in child development are associated with multiple factors. This study aims to analyze if vitamin A supplementation is associated with improved development and how this effect could be mediated by nutritional status. Population-based study surveyed a representative sample of 8000 households, 1232 children 0-35 months, in the state of Ceará, Brazil. The variables analysed included child developmental status, nutritional determinants and confounding factors. The main effects and interactions were evaluated using Cox regressive models. Vitamin A supplementation showed protective effect to delay in cognitive and motor development modified by interaction with nutritional status. While well-nourished supplemented children presented a 67% lower risk of cognitive delay (adjusted PRR = 0·33 [0·21-0·53]), stunted children had no benefit from supplementation (adjusted PRR = 0·97 [0·39-2·40]). Vitamin A supplementation has a protective effect on child development, but not in stunted children. This suggests that supplementation is effective in promoting child development, especially if associated to a joint effort to improve the nutritional status of children, given the importance of this mediator.
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Transtornos da Nutrição Infantil/prevenção & controle , Suplementos Nutricionais , Transtornos do Crescimento/prevenção & controle , Vitamina A/administração & dosagem , Brasil , Desenvolvimento Infantil/fisiologia , Pré-Escolar , Estudos Transversais , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Estado NutricionalRESUMO
BACKGROUND: Brazil presented an alarming number of newborns with microcephaly in the years 2015 and 2016. The investigation of the cases raised the suspicion of the association of these cases with maternal infections by the zika virus. Also, in 2015, there was an epidemic of zika virus infection in Brazil, reinforcing this hypothesis. OBJECTIVE: The objective of this study was to identify factors associated with the diagnosis of microcephaly in newborns, including zika virus infection. METHODS: We conducted a case-control study. The cases were defined as children who received clinical and imaging diagnosis of microcephaly, born after October 2015 in Ceará, Brazil, which recorded the highest number of microcephaly cases in Brazil during the outbreak. The cases were identified in medical records of public and private maternity hospitals and in child development stimulation clinics tracked until June 2017. Epidemiological, clinical, and socioeconomic variables were collected, visiting their homes and confirming data from their medical records. Controls were children without microcephaly identified in the vicinity of the residence of each case. Logistic regression models were used to control confounding. FINDINGS: We evaluated 58 cases and 116 controls. The odds of having a baby with microcephaly was 14 times higher among mothers who had zika virus infection (p < 0.001), after multivariate analysis. Arboviruses infections symptoms, as fever (p = 0.220), skin change (p < 0.001), and joint pain (p = 0.002) also demonstrated an association with microcephaly. CONCLUSIONS: Maternal infection zika virus was associated with a diagnosis of microcephaly. Our study contributes to the investigation of the epidemiological factors associated with the diagnosis of microcephaly.
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Microcefalia/epidemiologia , Infecção por Zika virus/epidemiologia , Artralgia/epidemiologia , Artralgia/virologia , Brasil/epidemiologia , Estudos de Casos e Controles , Exantema/epidemiologia , Exantema/virologia , Feminino , Febre/epidemiologia , Febre/virologia , Humanos , Lactente , Masculino , Microcefalia/diagnóstico por imagem , Microcefalia/virologia , Infecção por Zika virus/complicaçõesRESUMO
Abstract 200 million pre-school age children are not developing properly. Delays in child development are associated with multiple factors. This study aims to analyze if vitamin A supplementation is associated with improved development and how this effect could be mediated by nutritional status. Population-based study surveyed a representative sample of 8000 households, 1232 children 0-35 months, in the state of Ceará, Brazil. The variables analysed included child developmental status, nutritional determinants and confounding factors. The main effects and interactions were evaluated using Cox regressive models. Vitamin A supplementation showed protective effect to delay in cognitive and motor development modified by interaction with nutritional status. While well-nourished supplemented children presented a 67% lower risk of cognitive delay (adjusted PRR = 0·33 [0·21-0·53]), stunted children had no benefit from supplementation (adjusted PRR = 0·97 [0·39-2·40]). Vitamin A supplementation has a protective effect on child development, but not in stunted children. This suggests that supplementation is effective in promoting child development, especially if associated to a joint effort to improve the nutritional status of children, given the importance of this mediator.
Resumo Duzentos milhões de crianças em idade pré-escolar não estão se desenvolvendo adequadamente. Os atrasos no desenvolvimento estão associados a múltiplos fatores. Este estudo pretende analisar se a suplementação de vitamina A está associada a melhor desenvolvimento e a forma como esse efeito pode ser mediado pelo estado nutricional. Estudo de base populacional com amostra de 8.000 famílias, 1.232 crianças 0-35 meses, no estado do Ceará, Brasil. As variáveis analisadas incluíram desenvolvimento, determinantes nutricionais e fatores de confusão. Os efeitos e as interações foram avaliados utilizando modelos regressivos de Cox. A suplementação de vitamina A foi protetora para atraso no desenvolvimento cognitivo e motor modificado pela interação com o estado nutricional. Crianças suplementadas bem nutridas apresentaram um risco 67% menor de atraso cognitivo (PRR ajustado = 0 33 [0 21-0 53]), já as crianças desnutridas não se beneficiaram (PRR ajustado = 0 97 [0 39-2 40]). A suplementação tem um efeito protetor sobre o desenvolvimento, mas não em crianças desnutridas. Isso sugere que a suplementação é eficaz na promoção do desenvolvimento, especialmente se associada a um esforço para melhorar o estado nutricional infantil, dada a importância desse mediador.
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Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Pré-Escolar , Vitamina A/administração & dosagem , Transtornos da Nutrição Infantil/prevenção & controle , Suplementos Nutricionais , Transtornos do Crescimento/prevenção & controle , Brasil , Desenvolvimento Infantil/fisiologia , Estado Nutricional , Estudos TransversaisRESUMO
BACKGROUND: Cross-sectional studies are fundamental studies in the practice of epidemiological science. This article aims to present in detail the methodology for conducting a series of cross-sectional studies, as well as the analysis of data through pooled data. METHODS: The series of studies are population cross-sectional studies, with statewide coverage, searching for representative sample of reproductive aged women and pre-school children in Ceará, Brazil. The sampling plan followed simple random, stratified, systematic and by conglomerates, in sequence. About 300 variables were collected. For each of the individual studies, multivariate data analysis was used to verify associations between dependent variables. For all the studies together, techniques used were trend chi-squared and pooled data analysis using linear mixed modeling procedures. RESULTS: There were 6 studies in sequence, for 30 years. Among other findings, the variables income, maternal education and breastfeeding time proved to be associated with the reduction of malnutrition in children considering all the period (p values 0.013, 0.033 and 0.037, respectively). CONCLUSIONS: Cross-sectional studies can be replicated at regular time series following the methodology exposed in this, even for locations with limited resources, ensuring adequate management of decisions of using federal funding aimed at achieving targeted programs to maximize the results obtained with the public resource available.