P02.92. The effect of physical activity, obesity, and low vitamin D on all cause mortality in US adults

Methods We used data from 16,285 adults 20 years and older who participated in a home interview and a mobile examination of the Third National Health and Nutrition Examination Survey (1988-1994) that were linked to National Death Index mortality files up to 2006. Physical activity categories included: Inactive (less than 1/wk), Somewhat active (2-4 times/wk), and Active (5+/wk). Body mass index (BMI) included: Underweight (<18.5), Normal weight (18.5-24.9), Overweight (25-29.9), and Obese (30+). Serum 25(OH) D were divided into quartiles, and quartile 1 or low levels included those with values of ≤ 50 nmol/L. Cox proportional hazards were calculated using SAS and SUDAAN softwares to account for sampling weights of NHANES.