D-32 Free Communication/Poster - Epidemiology of Physical Activity and Health in Older Adults Thursday, June 2, 2016, 1: 00 PM - 6: 00 PM Room: Exhibit Hall A/B
Body fatness and decreased physical activity are associated with low serum vitamin D in children, adolescents, and adults. However, little is known regarding the etiology of vitamin D deficiency in older adults, especially in Korea.
PURPOSE: To investigate the relationships between serum vitamin D deficiency with physical activity and body fatness in older Korean adults.
METHODS: In a cross-sectional design, 39 men and 194 women aged >65 years underwent accelerometer-based monitoring of daily physical activity and body fatness assessment. Serum vitamin D levels were determined by using the LIAISON 25(OH) Vitamin D TOTAL Assay. Based on serum vitamin D levels, subjects were classified as sufficiency (>30 ng•ml-1), insufficiency (20~29 ng•ml-1), and deficiency (150min moderate and vigorous physical activity per week) were used to classify the subjects either active (met the recommendations) or inactive (did not meet the recommendations). Logistic regression analyses were used to determine the odds ratio (OR) for having serum vitamin D inadequacy. Statistical significances were tested at P=0.05.
RESULTS: Vitamin D levels were positively associated with daily step (r=0.441 and P<0.001), low- (r=0.343 and P<0.001), moderate- (r=0.351 and P<0.001), high-intensity physical activity (r=0.293 and P<0.001) and negatively associated with body mass index (r=−0.223 and P=0.001), percent of body fat (r=−0.182 and P=0.005) and waist circumference (r=−0.196 and P=0.003). Compared to the active group (OR=1), the inactive group had a significantly higher OR (OR=4.157; 95% confidence interval=1.688~10.235; P=0.001) for having vitamin D deficiency even after adjusting for covariates such as age, sex, and body fatness.
CONCLUSION: The current findings suggest that physical activity along with vitamin D supplementation should be promoted as a preventive means against vitamin D deficiency in elderly Koreans.
Supported by The National Research Foundation Grant funded by the Korean Government (2014R1A1A2056473).