Baseline socio-demographic characteristics of the intervention and placebo groups.

HOMA-IR, homeostasis model assessment insulin resistance; CVD, cardiovascular disease; PTH, parathyroid hormone; 25(OH)D, 25-hydroxyvitamin D; IQR, Interquartile range; PCS, Physical component score; MCS, Mental component score; BMI was calculated as weight (kilogram) divided by height (m2).aDetermined with independent t-test or Mann-Whitney test for continuous variables as appropriate and with χ2 test for categorical data.Baseline socio-demographic characteristics of the intervention and placebo groups.