Risk a for insulin resistance b at follow up among participants without baseline insulin resistance.

25(OH)D, 25-hydroxyvitamin D; OR (95% CI), odds ratio with 95% confidence interval; # visits, numbers of follow up visits; nmol/L, nanomoles per liter.a The analyses were adjusted for the variables included in the table, and additionally adjusted for gender, baseline body mass index, age, hypertension, serum low-density lipoprotein cholesterol, season at baseline, season at follow up, tobacco smoking status, alcohol drinking status, and physical activity at baseline, physical activity change during follow upb Insulin resistance was defined as HOMA-IR ≥ 2.73.Risk a for insulin resistance b at follow up among participants without baseline insulin resistance.