Multivariable-Adjusted Mean Vitamin D–Related Biomarker Concentrations at Baseline and 2 Years’ Follow-up, by Randomized Treatment Assignment and Baseline Body Mass Index (BMI)
WEST, TYPE 2 DIABETES
Concentrations shown for total 25-hydroxyvitamin D (25-OHD) (A), 25-OHD3 (B), free vitamin D (C), bioavailable vitamin D (D), vitamin D–binding protein (E), albumin (F), parathyroid hormone (PTH) (G), and calcium (H). Circles and bars are least square mean (standard error of the mean) or geometric mean (95% CI) adjusted for baseline factors: age (continuous), sex (male, female), prevalence of type 2 diabetes, preintervention vitamin D supplement use, smoking status (never, past, current, not reported), total physical activity (above, below median = 16.6 metabolic equivalents of task hours per week), race and ethnicity (Asian or Pacific Islander, Black, Native American or Alaska Native, non-Black Hispanic, non-Hispanic White, other/unknown, not reported), geographic region (West, South, Midwest, Northeast), season of blood draw (winter, spring, summer, fall), and in-person Clinical and Translational Science Center subgroup participation. BMI indicates body mass index. To convert albumin to grams per liter, multiply by 10; calcium to millimoles per liter, multiply by 0.25; 25-OHD to nanomoles per liter, multiply by 2.496; PTHe to nanograms per liter, multiply by 1.