Concordancia entre la balanza de silla y la balanza de piso para la medición de peso en los adultos mayores del centro de atención al adulto mayor de la ciudad de Cuenca, 2022

Abstract

Background: establishing the weight of the older adult is important for their health; however, the estimation of weight by doctors and health personnel is usually imprecise, adding to the questioning of the instruments used to take it. Objective: to validate the weight measurement of the chair scale versus the floor scale in older adults of Cuenca city using the Bland-Altman graphic method. Methods: a concordance study was carried out in 204 older adults from the “Centro de Atención al Adulto Mayor” in Cuenca. The demographic and anthropometric data was conducted by a form created by the authors. The weight was measured on the ADE model M304641-01 floor scale and on the ADE model M400660 chair scale. The data was tabulated and graphed in the statistical software SPSS version 25.0. The analysis of the information was based on the Bland-Altman method with calculations of limits of agreement with 95% confidence intervals and bias for which statistical significance <0.001 was defined. Results: the mean difference between the scales was -0.31617 kg with a bias of <0.001, with the chair scale, being the one that overestimates the calculated weight, this difference raises to -0.6 kg in patients with 100 kg or higher. Conclusions: using the Bland-Altman method, the mean difference between the scales was -0.32 kg, which is statistically significant, so there is no concordance between the two scales analyzed.