14.11 Data Analysis Repeated measures ANOVA will be conducted for all measures collected at more than two time points, to determine differences between treatment groups. These include: body composition (DXA, weight, BMI, waist/hip circumferences), dietary data, physical activity, resting metabolic rate, visual analog scale and blood pressure. Consistent with a pre/post design, paired t-tests will determine differences in biochemical variables measured at weeks 0 and 16. Regression analyses will be used to predict kilograms of fat mass lost, with predictor variables including obesity phenotype (predominantly android vs. predominantly gynoid adjusted for any differences in BMI), baseline 25(OH)D status, age, etc.