DIETARY VITAMIN D INTAKE IS ASSOCIATED WITH SKELETAL MUSCLE MASS IN COMMUNITY-DWELLING OLDER JAPANESE WOMEN
M. Yamada, K. Terai, S. Nishiguchi, K. Yoshimura, Y. Kajiwara, T. Sonoda, T. Aoyama
J Aging Res Clin Practice 2012;1(3):209-212
Background & purpose: Recently, several studies have suggested that low serum 25-hydroxyvitamin D levels are associated with sarcopenia (age-related loss of skeletal muscle mass). However, the relationship between dietary vitamin D intake and skeletal muscle mass in older adults remains unclear. The purpose of this cross-sectional study was therefore to determine whether dietary vitamin D intake is associated with muscle mass in community-dwelling older Japanese women. Methods: Ninety-one older Japanese women (mean age, 73.0 ± 5.5 years) participated in this cross-sectional study. We measured the skeletal muscle mass index(SMI) of the participants using bioelectrical impedance, the intake of several dietary nutritional factors using a food-frequency questionnaire, and physical activity. Results: The SMI correlated with level of vitamin D intake(r=0.208, p=0.037) and body mass index (r=0.330, p=0.001). Regression analysis revealed that vitamin D (β=0.308; 95% confidence interval, 0.022–0.303) was a significant and independent determinant of the SMI (p<0.001). Conclusion: Dietary vitamin D intake is associated with the SMI in older, community-dwelling Japanese women.