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Validación del índice de masa corporal auto-referido en la Encuesta Nacional de Salud
Other Titles: Validity of self-reported body mass index in the National Health Survey
Authors: Basterra-Gortari, F.J. (Francisco Javier)
Bes-Rastrollo, M. (Maira)
Forga, L. (Luis)
Martinez, J.A. (José Alfredo)
Martinez-Gonzalez, M.A. (Miguel Angel)
Keywords: Obesity
Weight
Issue Date: 2007
Publisher: Gobierno de Navarra. Departamento de Salud
Publisher version: http://www.cfnavarra.es/salud/anales/textos/vol30/n3/PDFs/06-Validacion%20del%20indice%20de%20masa.pdf
ISSN: 1137-6627
Citation: Basterra-Gortari FJ, Bes-Rastrollo M, Forga L, Martinez JA, Martinez-Gonzalez MA. Validación del índice de masa corporal auto-referido en la Encuesta Nacional de Salud. An Sist Sanit Navar 2007 Sep-Dec;30(3):373-381
Abstract
Objective. To assess the validity of self-reported body mass index in the National Health Survey. 120 participants were selected and questioned about their weight and height with exactly the same questions that the National Health Survey uses. Afterwards, and once informed consent was obtained, participants were weighed and measured, and this data was used as the gold standard. On average, participants underestimated their weight by 1.39 kg, overestimated their height by 0.55 cm and underestimated their body mass index by 0.71 kg/m2. The sensitivity of self-reported self reported body mass index (BMI) to detect overweight was 77%, the specificity was 97%, the positive predictive value was 0.95 and the negative predictive value was 0.86. The Kappa index was 0.76 and the quadratically weighted Kappa index was 0.85. The correlation coefficient between self-reported and measured BMI was 0.96 and the intraclass correlation coefficient was 0.97. Self-reported data is an efficient way of obtaining information about BMI, although with limitations, because self-reported data tends to underestimate weight and overestimate height, thus underestimating BMI and the proportion of participants with elevated BMI.
Permanent link: http://hdl.handle.net/10171/22543
Appears in Collections:DA - Medicina - MPSP -Artículos de revista
DA - Farmacia - CAFT - Artículos de revista
DA - CUN - Medicina preventiva - Artículos de revista

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