Estimativa de peso corporal e estatura em idosos: concordância entre métodos

Abstract

OBJECTIVE: To compare different equations to estimate body weight and height in older adults and determine which ones provide the most reliable estimates. METHODS: This descriptive, cross-sectional study was conducted at a health clinic in Lagarto, Sergipe, Brazil. The sample consisted of older men and women who were able to walk. We measured body weight, body height, knee height, calf circumference, arm circumference, waist circumference, half arm span, and subscapular skinfold thickness. Then, we used different equations to estimate weight and height in that sample. The results of the equations were compared with actual measures of weight and height to determine their level of agreement. Paired t-test and Bland-Altman test were used in the statistical analysis. The level of statistical significance was set at p ≤ 0.05. RESULTS: Sixty-three patients participated in the study. Most of them were women (74.6%), and mean age was 68.1 ± 5.8 years. Rabito et al.'s equation, which uses arm circumference to estimate height, showed a smaller mean difference from the actual measure. Regarding weight, Chumlea et al.'s equation showed a smaller mean difference. CONCLUSION: Those two equations are recommended to assess height and weight, especially in the older population.