Published
2012-05-01
MODELACIÓN DE INDICADORES DEL ESTADO NUTRICIONAL DE LA EMBARAZADA DESDE UN ENFOQUE MULTINIVEL
MODELING OF INDICATORS OF NUTRITIONAL STATUS OF PREGNANT WOMEN FROM A MULTILEVEL APPROACH
Keywords:
antropometría, estudios longitudinales, medidas repetidas, modelo multinivel (es)Anthropometry, Longitudinal studies, Multilevel model, Repeated measurements (en)
Se presenta una estrategia para la construcción de indicadores antropométricos empleados para evaluar el estado nutricional de la mujer embarazada. Las referencias del peso por semana de embarazo, según la estatura y el índice de masa corporal de la mujer al inicio de la gestación, se construyen a partir de modelos multinivel para medidas repetidas. Para verificar la consistencia de los valores estimados y ajustar el posible efecto del desbalance de los datos causado por observaciones perdidas, las estimaciones máximoverosímil se comparan con las obtenidas mediante un método bootstrap. Los resultados obtenidos no sólo evidencian el poder de los modelos multinivel para la construcción de patrones de referencia, sino que además permiten estimar rangos de ganancia de peso recomendados para las embarazadas de la población en estudio.
A strategy for the construction of anthropometric indicators employed for the evaluation of the pregnant women’s nutritional state is presented. The references of weight by pregnancy week, according to height and the body mass index at the beginning of pregnancy, are constructed by means of multilevel models for repeated measurements. The maximum likelihood estimations are compared to those obtained by the bootstrap method in order to verify the consistency of the estimated values and the fitting of the possible data imbalance effect, caused by missing observations. The obtained results evidence not only the power of the multilevel models for the construction of reference patterns, but they also permit estimate ranks of gain in weight recommended for pregnant women representative of the population under study.
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Copyright (c) 2012 Revista Colombiana de Estadística

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