Factors associated with the adequacy of gestational weight gain among Brazilian teenagers. / Fatores associados à adequação do ganho de peso gestacional de adolescentes brasileiras.

The scope of this article is to evaluate the adequacy of total gestational weight gain (GWG) according to maternal characteristics of Brazilian adolescents. It involved a cross-sectional, hospital-based study. A total of 3,904 teenagers with a single fetus gestation and gestational age (GA) at birth ≥ 37 weeks were included. A hierarchical model was built to analyze the dependent and independent variables adequacy of GWG: sociodemographic, care, obstetric and behavioral characteristics. The chances of insufficient GWG were higher for adolescents from the North (OR = 1.50, 95%CI: 1.07-2.10) and Northeast (OR = 1.68, 95%CI: 1.27-2.21). Paid work increased the chances of insufficient (95%CI: 1.15-2.39) and excessive (95%CI: 1.01-1.86) GWG. The pre-pregnancy body mass index of overweight or obese adolescents was associated with excessive GWG (OR = 1.86, 95%CI: 1.19-2.92 and OR = 3.06, 95%CI: 2.10-4.45, respectively), as well as GA ≥ 42 weeks (OR = 2.23, 95%CI: 1.03-4.81). Living in the North and Northeast regions increases the chances of adolescents having insufficient GWG. Having paid work was associated with a greater chance of excessive and insufficient GWG. Furthermore, pre-pregnancy excess weight or obesity and GA ≥ 42 weeks increased the chances of excessive GWG.

O objetivo deste artigo é avaliar a adequação do ganho de peso gestacional total (GPT) segundo características maternas de adolescentes brasileiras. Estudo transversal e de base hospitalar. Foram incluídos 3.904 adolescentes com gestação de feto único e idade gestacional (IG) ao nascimento ≥ 37 semanas. Foi construído um modelo hierarquizado para analisar as variáveis dependentes e a adequação do GPT e das independentes: características sociodemográficas, assistenciais, obstétricas e comportamentais. As chances de GPT insuficiente foram maiores para as adolescentes do Norte (OR = 1,50; IC95%: 1,07-2,10) e Nordeste (OR = 1,68; IC95%: 1,27-2,21). O trabalho remunerado elevou as chances de GPT insuficiente (IC95%: 1,15-2,39) e excessivo (IC95%: 1,01-1,86). O índice de massa corporal pré-gestacional de sobrepeso ou obesidade associou-se ao GPT excessivo (OR = 1,86; IC95%: 1,19-2,92 e OR = 3,06; IC95%: 2,10-4,45, respectivamente), bem como a IG ≥ 42 semanas (OR = 2,23; IC95%: 1,03-4,81). Residir nas regiões Norte e Nordeste aumentou as chances de as adolescentes apresentarem GPT insuficiente. Exercer trabalho remunerado esteve associado a maior chance de GPT excessivo e insuficiente. Além disso, o sobrepeso ou obesidade pré-gestacional e IG ≥ 42 semanas ampliaram as chances de GPT excessivo.

Fatores associados à adequação do ganho de peso gestacional de adolescentes brasileiras / Factors associated with the adequacy of gestational weight gain among Brazilian teenagers

Resumo O objetivo deste artigo é avaliar a adequação do ganho de peso gestacional total (GPT) segundo características maternas de adolescentes brasileiras. Estudo transversal e de base hospitalar. Foram incluídos 3.904 adolescentes com gestação de feto único e idade gestacional (IG) ao nascimento ≥ 37 semanas. Foi construído um modelo hierarquizado para analisar as variáveis dependentes e a adequação do GPT e das independentes: características sociodemográficas, assistenciais, obstétricas e comportamentais. As chances de GPT insuficiente foram maiores para as adolescentes do Norte (OR = 1,50; IC95%: 1,07-2,10) e Nordeste (OR = 1,68; IC95%: 1,27-2,21). O trabalho remunerado elevou as chances de GPT insuficiente (IC95%: 1,15-2,39) e excessivo (IC95%: 1,01-1,86). O índice de massa corporal pré-gestacional de sobrepeso ou obesidade associou-se ao GPT excessivo (OR = 1,86; IC95%: 1,19-2,92 e OR = 3,06; IC95%: 2,10-4,45, respectivamente), bem como a IG ≥ 42 semanas (OR = 2,23; IC95%: 1,03-4,81). Residir nas regiões Norte e Nordeste aumentou as chances de as adolescentes apresentarem GPT insuficiente. Exercer trabalho remunerado esteve associado a maior chance de GPT excessivo e insuficiente. Além disso, o sobrepeso ou obesidade pré-gestacional e IG ≥ 42 semanas ampliaram as chances de GPT excessivo.

Abstract The scope of this article is to evaluate the adequacy of total gestational weight gain (GWG) according to maternal characteristics of Brazilian adolescents. It involved a cross-sectional, hospital-based study. A total of 3,904 teenagers with a single fetus gestation and gestational age (GA) at birth ≥ 37 weeks were included. A hierarchical model was built to analyze the dependent and independent variables adequacy of GWG: sociodemographic, care, obstetric and behavioral characteristics. The chances of insufficient GWG were higher for adolescents from the North (OR = 1.50, 95%CI: 1.07-2.10) and Northeast (OR = 1.68, 95%CI: 1.27-2.21). Paid work increased the chances of insufficient (95%CI: 1.15-2.39) and excessive (95%CI: 1.01-1.86) GWG. The pre-pregnancy body mass index of overweight or obese adolescents was associated with excessive GWG (OR = 1.86, 95%CI: 1.19-2.92 and OR = 3.06, 95%CI: 2.10-4.45, respectively), as well as GA ≥ 42 weeks (OR = 2.23, 95%CI: 1.03-4.81). Living in the North and Northeast regions increases the chances of adolescents having insufficient GWG. Having paid work was associated with a greater chance of excessive and insufficient GWG. Furthermore, pre-pregnancy excess weight or obesity and GA ≥ 42 weeks increased the chances of excessive GWG.

Different methods for assessing gestational weight gain and its association with birth weight. / Diferentes métodos para avaliação do ganho de peso gestacional e sua associação com o peso ao nascer.

OBJECTIVE: To analyze association of different methods of gestational weight gain assessment with live births small for gestational age (SGA) and large for gestational age (LGA). METHODS: This was a cross-sectional study with adult women, normal prepregnancy BMI, single pregnancy and gestational age at delivery ≥28 weeks, from the "Birth in Brazil" study, between 2011 and 2012. RESULTS: Among the 11,000 women participating in the study, prevalence of excessive weight gain was 33.1% according to the Brandão et al. and Institute of Medicine (IOM) methods, and 37.9% according to the Intergrowth method. The chance of being born SGA in the case of insufficient weight gain was OR=1.52 (95%CI 1.06;2.19), OR=1.52 (95%CI 1.05;2.20) and OR=1.56 (95%CI 1.06;2.30) for the Brandão et al., IOM and Intergrowth methods, respectively. Likelihood of excessive weight gain using the same methods was OR=1.53 (95%CI 1.28;1.82), OR=1.57 (95%CI 1.31;1.87) and OR=1.65 (95%CI 1.40;1.96), for LGA respectively. CONCLUSION: Compared to the IOM recommendations, the Intergrowth and Brandão et al. methods show themselves to be alternatives for identifying SGA and LGA.

Diferentes métodos para avaliação do ganho de peso gestacional e sua associação com o peso ao nascer / Diferentes métodos para evaluar el aumento de peso gestacional y su asociación con el peso al nacer / Different methods for assessing gestational weight gain and its association with birth weight

Objetivo: Analisar a associação de diferentes métodos para avaliação do ganho de peso gestacional com nascidos vivos pequenos para idade gestacional (PIG) ou grandes para idade gestacional (GIG). Métodos: Estudo transversal, com mulheres adultas, IMC pré-gestacional de eutrofia, gestação única e idade gestacional no parto ≥28 semanas, da pesquisa 'Nascer no Brasil', em 2011-2012. Resultados: Participaram do estudo 11 mil mulheres; a prevalência de ganho excessivo foi de 33,1% segundo os métodos Brandão et al., e IOM, e 37,9% segundo Intergrowth. A chance de nascer PIG para ganho de peso insuficiente foi de OR=1,52 (IC95% 1,06;2,19), OR=1,52 (IC95% 1,05;2,20) e OR=1,56 (IC95% 1,06;2,30) para Brandão et al., IOM e Intergrowth, respectivamente, enquanto o ganho de peso excessivo apresentou OR=1,53 (IC95% 1,28;1,82), OR=1,57 (IC95% 1,31;1,87) e OR=1,65 (IC95% 1,40;1,96), para GIG, respectivamente. Conclusão: Comparados às recomendações do IOM, Intergrowth e Brandão et al. apresentam-se como alternativas para identificar PIG e GIG.

Objetivo: Analizar diferentes métodos de evaluación del aumento de peso gestacional (APG) con nacidos vivos pequeños para la edad gestacional (PEG) y grandes para la edad gestacional (GEG). Métodos: Estudio transversal, con mujeres adultas, IMC pregestacional eutrófico, un solo embarazo y edad gestacional al nacer ≥28 semanas, del estudio `Nacer en Brasil´, entre 2011 y 2012. Resultados: En las 11.000 mujeres del estudio, la prevalencia de ganancia excesiva fue del 33,1% según los métodos de Brandão et.al. y el IOM y 37,9% para Intergrowth. La probabilidad de nacer PEG por una ganancia de peso insuficiente fue OR=1,52 (IC95% 1,06; 2.19), OR=1,52 (IC95% 1,05; 2.20) y OR=1,56 (IC95% 1,06; 2.30) para Brandão et.al, IOM e Intergrowth. La ganancia de peso excesiva, en los mismos métodos presentó OR=1,53 (IC95% 1,28;1,82), OR=1,57 (IC95% 1,31;1.87) y OR=1,65 (IC95% 1,40;1,96) para GEG. Conclusión: En comparación con las recomendaciones del IOM, Intergrowth y Brandão et.al. se presentan como alternativas en la identificación de PEG y GEG.

Objective: To analyze association of different methods of gestational weight gain assessment with live births small for gestational age (SGA) and large for gestational age (LGA). Methods: This was a cross-sectional study with adult women, normal prepregnancy BMI, single pregnancy and gestational age at delivery ≥28 weeks, from the "Birth in Brazil" study, between 2011 and 2012. Results: Among the 11,000 women participating in the study, prevalence of excessive weight gain was 33.1% according to the Brandão et al. and Institute of Medicine (IOM) methods, and 37.9% according to the Intergrowth method. The chance of being born SGA in the case of insufficient weight gain was OR=1.52 (95%CI 1.06;2.19), OR=1.52 (95%CI 1.05;2.20) and OR=1.56 (95%CI 1.06;2.30) for the Brandão et al., IOM and Intergrowth methods, respectively. Likelihood of excessive weight gain using the same methods was OR=1.53 (95%CI 1.28;1.82), OR=1.57 (95%CI 1.31;1.87) and OR=1.65 (95%CI 1.40;1.96), for LGA respectively. Conclusion: Compared to the IOM recommendations, the Intergrowth and Brandão et al. methods show themselves to be alternatives for identifying SGA and LGA.

Validity of self-reported weight, height, and BMI in mothers of the research Birth in Brazil.

OBJECTIVE: To evaluate the accuracy of information on pre-gestational weight, height, pre-gestational body mass index, and weight at the last prenatal appointment, according to maternal characteristics and sociodemographic and prenatal variables. METHODS: The study was developed using data from the face-to-face questionnaire and prenatal card (gold standard) of the study "Birth in Brazil, 2011-2012". To evaluate the differences between the measured and self-reported anthropometric variables, we used the the Kruskal-Wallis test for the variables divided into quartiles. For the continuous variables, we used the Wilcoxon test, Bland-Altman plot, and average difference between the information measured and reported by the women. We estimated sensitivity and the intraclass correlation coefficient. RESULTS: In the study, 17,093 women had the prenatal card. There was an underestimation of pre-gestational weight of 1.51 kg (SD = 3.44) and body mass index of 0.79 kg/m2 (SD = 1.72) and overestimation of height of 0.75 cm (SD = 3.03) and weight at the last appointment of 0.22 kg (SD = 2.09). The intraclass correlation coefficients (ICC) obtained for the anthropometric variables were: height (ICC = 0.89), pre-gestational weight (ICC = 0.96), pre-gestational body mass index (ICC = 0.92), and weight at the last appointment (ICC = 0.98). CONCLUSIONS: The results suggest that the mentioned anthropometric variables were valid for the study population, and they may be used in studies of populations with similar characteristics.

Validity of self-reported weight, height, and BMI in mothers of the research Birth in Brazil / Validade de peso, estatura e IMC referidos por puérperas do estudo Nascer no Brasil

ABSTRACT OBJECTIVE To evaluate the accuracy of information on pre-gestational weight, height, pre-gestational body mass index, and weight at the last prenatal appointment, according to maternal characteristics and sociodemographic and prenatal variables. METHODS The study was developed using data from the face-to-face questionnaire and prenatal card (gold standard) of the study "Birth in Brazil, 2011-2012". To evaluate the differences between the measured and self-reported anthropometric variables, we used the the Kruskal-Wallis test for the variables divided into quartiles. For the continuous variables, we used the Wilcoxon test, Bland-Altman plot, and average difference between the information measured and reported by the women. We estimated sensitivity and the intraclass correlation coefficient. RESULTS In the study, 17,093 women had the prenatal card. There was an underestimation of pre-gestational weight of 1.51 kg (SD = 3.44) and body mass index of 0.79 kg/m2 (SD = 1.72) and overestimation of height of 0.75 cm (SD = 3.03) and weight at the last appointment of 0.22 kg (SD = 2.09). The intraclass correlation coefficients (ICC) obtained for the anthropometric variables were: height (ICC = 0.89), pre-gestational weight (ICC = 0.96), pre-gestational body mass index (ICC = 0.92), and weight at the last appointment (ICC = 0.98). CONCLUSIONS The results suggest that the mentioned anthropometric variables were valid for the study population, and they may be used in studies of populations with similar characteristics.

RESUMO OBJETIVO Avaliar a acurácia das informações de peso pré-gestacional, estatura, índice de massa corporal pré-gestacional e peso na última consulta de pré-natal, segundo características maternas, variáveis sociodemográficas e de pré-natal. MÉTODOS O estudo foi desenvolvido com dados do questionário face a face e do cartão da gestante (padrão-ouro) do estudo "Nascer no Brasil, 2011-2012". Para avaliar as diferenças entre as variáveis antropométricas medidas e referidas, utilizou-se o teste de Kruskal-Wallis para as variáveis dividas em quartis. Para as variáveis contínuas, adotou-se o teste de Wilcoxon, gráficos de Bland e Altman, diferença média entre as informações medidas e referidas pelas mulheres. Estimou-se a sensibilidade e o coeficiente de correlação intraclasse. RESULTADOS No estudo, 17.093 mulheres possuíam cartão de gestante. Observou-se uma subestimação do peso pré-gestacional em 1,51 kg (DP = 3,44) e do índice de massa corporal em 0,79 kg/m2 (DP = 1,72), e superestimação da estatura em 0,75 cm (DP = 3,03) e do peso na última consulta em 0,22 kg (DP = 2,09). Os coeficientes de correlação intraclasse (CCIC) obtidos para as variáveis antropométricas foram: estatura (CCIC = 0,89), peso pré-gestacional (CCIC = 0,96), índice de massa corporal pré-gestacional (CCIC = 0,92) e peso na última consulta (CCIC = 0,98). CONCLUSÕES Os resultados sugerem que as variáveis antropométricas referidas foram válidas para a população de estudo, e podem ser utilizadas em estudos com populações que tenham características semelhantes.

Acurácia das medidas de peso e estatura autorreferidas por puérperas do estudo Nascer no Brasil / Accuracy of measurements of weight and height self-reported by mothers study Born in Brazil

Objetivo: Avaliar a acurácia das informações de peso pré-gestacional, estatura, índice de massa corporal (IMC) pré-gestacional e peso na última consulta de pré-natal, segundo características maternas, variáveis sociodemográficas e de pré-natal. Métodos: O estudo foi desenvolvido com dados do questionário face a face e do cartão da gestante (padrão-ouro) do estudo Nascer no Brasil, 2011 – 2012. Para avaliar as diferenças entre as variáveis medidas e referidas, utilizou-se o teste de Kruskal-Wallis para as variáveis dividas em quartis e para as variáveis contínuas, adotou-se o teste de Wilcoxon, gráficos de Bland & Altman, diferença média entre as informações medidas e referidas pelas mulheres, sensibilidade e coeficiente de correlação intraclasse (CCIC). (...) O coeficiente de correlação intraclasse para estatura obtido foi CCIC=0,89, peso pré-gestacional 0,96, IMC pré-gestacional 0,92 e peso na última consulta foi de 0,98. Conclusão: Os resultados aqui encontrados mostraram que os as variáveis antropométricas referidas foram válidos para a população de estudo, e podem ser utilizados em estudos com populações que tenham características semelhantes.

Objective: This study assesses the accuracy of self-report of pregravid weight, height, pregravid body mass index (BMI) and weight at the last prenatal visit, according to maternal characteristics, socio-demographic and prenatal variables. Methods: The informations was obtained from a national hospital-based survey Birth in Brazil, 2011 – 2012 with postpartum women through face to face questionnaire and prenatal card (gold standard). To evaluate the differences between the variables measured and reported, we used the Kruskal-Wallis test for variables divided into quartiles and for continuous variables, we adopted the Wilcoxon test, Bland & Altman, mean differences between the measured variables and self-reported by the women, sensitivity and intraclass correlation coefficient (ICC). (...) The sensitivity was satisfactory for the study variables.The intraclass correlation coefficient for height obtained ICC = 0.89, pregravid weight ICC = 0.96, pregravid BMI ICC = 0.92 and weight at the last visit was ICC = 0.98. Conclusion: The present results indicated that anthropometric variables mentioned were valid for the study population, and can be used in studies of populations that have similar characteristics.