Results of regression analyses for change in vitamin D from 0 to 24 weeks*.

*Abbreviations: CI, confidence interval; BMI, body mass index; β values are unstandardized regression coefficients.1Both treatment arms A and C are compared to treatment arm B.2Reference group is summer/fall (“high vitamin D season”), defined as months 12–5 (southern hemisphere) or 6–11 (northern hemisphere). Comparison group is reciprocal seasons for each hemisphere respectively.3Wald p-value for overall p-value for country in multivariate analyses. For individual countries in multivariate analayses, p-value is compared to reference country Brazil.4Reference group is female.5Reference group has no self-reported history of AIDS prior to study entry.6Wald p-value for overall p-value for race. For individual countries in multivariate analyses, p-value is compared to reference race Asian.