Circunferência da panturrilha como indicador de massa magra e seus fatores associados em idosos

Abstract

The aim of this study was to evaluate the Calf Circumference (CC) as lean body mass indicator and its associated factors. A total of 151 elderly people (≥ 60 years old) of both sexes enrolled in activities offered by two community groups for Seniors in Governador Valadares, MG, Brazil. They were assessed to characterize their living conditions, health, nutrition and food. The physical evaluation of the participants was made through the measures of weight, height and CC, besides the calculation and classification of the Body Mass Index (BMI). The CC was used to measure muscle mass reduction of the elderly (below 31 cm) for both sexes. The multivariate analysis was performed by multiple linear regression between CC values and other variables, with regression coefficients (β) and respective 95% Confidence Intervals (95%CI) estimated. It was found that 12.1% of the elderly presented below recommended CC, indicating a reduction of muscle mass. The reduction in CC values was significantly associated with the occurrence of self-reported diabetes (β =-3.73) and depression (β =-1.78), as well as good/very good health self- perception (β =-1.27). However, higher BMI values remained associated with higher CC (β =1.57). The frequency of CC occurrence below that recommended in this population was considered high. The fact that this condition was identified among the elderly with low weight, eutrophy and overweight; in addition to the association between low values thereof and occurrence of worsening nutritional and health conditions demonstrate that their use in clinical practice should be prioritized as an important risk marker in old age.