Table 2. Odds ratio (95% CI) of metabolic syndrome according to plasma 25-hydroxyvitamin D levels.

	Plasma 25(OH)D
	< 20 ng/ml	20 – 30 ng/ml	> 30 ng/ml
Model 1	1.86 (1.11, 3.07)	1.21 (0.73, 2.02)	1.00 (REF)
Model 2	2.11 (1.23, 3.63)	1.33 (0.78, 2.27)	1.00 (REF)
Model 3	2.27 (1.26, 4.10)	1.34 (0.78, 2.31)	1.00 (REF)
Model 4	2.25 (1.25, 4.07)	1.34 (0.78, 2.30)	1.00 (REF)

Model 1: adjusted for age, gender, race and season; Model 2: adjusted for covariates in model 1 plus body mass index, treatment arm, history of cardiovascular disease, estimated glomerular filtration rate and serum albumin levels; Model 3: adjusted for covariates in model 2 plus smoking status, alcohol intake, serum calcium, phosphorus, plasma intact parathyroid hormone, fibroblast growth factor 23, and 1,25-dihydroxyvitamin D; Model 4: adjusted for covariates in model 3 plus hypertension.