Seguridad Alimentaria en Colombia Y Modelo Rasch

Abstract

This study subjected two scales used to determine food security in national nutritional status surveys in Colombia (ENSIN) to the Rasch model to assess their performance on the contradictory evidence of its usefulness. In practical terms, the EPSA measures food insecurity based on a single item, p1, which due to its low difficulty (8.46 logits, standard deviation of 1.83) is inappropriate to measure the surveyed households. Based on statistical calculation five of the twelve items presented over fitting and three of the twelve (including the first) presented measurement degradation. Like the EPSA, p1 defines the result to a large extent showing that the test is inadequate for the surveyed households. Based on statistics at least four of the fifteen items showed over-adjustment and four of the fifteen, including the first, showed measurement degradation. Measurements using tools that are not appropriate, but attractive, can be a new and serious problem that adds to other conditions associated with household food insecurity.

Socioeconomic inequalities in the consumption of fruits and vegetables: Colombian National Nutrition Survey, 2010

“…Nevertheless, ecological studies incorporate complex gradients of the development of geodemographic units that summarize these differences in development levels into a few variables, such as monetary poverty and the prevalence and frequency of consumption/day, thereby providing greater discriminatory power between the study variables 52 . One final limitation is the question about the validity of the scale used in the ENSIN-2010 to measure food security in households 53,54 . None of the limitations have implications that could invalidate or raise questions about the results reported in this study.…”

Consumo de bocadillos y exceso de peso en niños colombianos

“…Los R24H fueron aplicados a todos los integrantes del hogar de manera repetida con intervalo mínimo de una semana para evitar respuestas con base en la memoria (31). La inseguridad alimentaria del hogar donde habita el menor se estableció con la escala ELCSA aplicada al jefe del hogar (32,33). Para asegurar datos plausibles del índice de masa corporal [kg/m2] (IMC), limitamos el análisis a sujetos sin embarazo.…”

Malnutrición y seguridad alimentaria: un estudio multinivel

“…Sin embargo en la práctica estas expresiones son equivalentes (1). La EPSA y la ELCSA que permiten medir la INSA, son en esencia, metodologías subjetivas que abordan la medición de la percepción del jefe del hogar sobre la incapacidad para acceder a los alimentos que su hogar necesita y del hambre que pueden experimentar sus integrantes, estos métodos son incapaces de estimar el consumo de energía y nutrientes, y para el caso de Colombia, hay evidencia de las limitaciones psicométricas de estas escalas (32,33). Los R24H repetidos también permiten medir la INSA al relacionar la ingesta usual de un individuo y su requerimiento (26,28).…”