TABLE 3.

Multivariate analysis for predictors of indexes of insulin resistance at 12 mo

Dependent variables and predictors	β	P
Model 11
lnHOMA index
BMI at baseline	0.020	0.004
Concentration at baseline	0.559	<0.0001
High to low dose	0.000
McAuley index
BMI at baseline	−0.038	0.035
Concentration at baseline	0.647	<0.0001
High to low dose	−0.090
Model 22
lnHOMA index
BMI at baseline	0.043	<0.0001
Prediabetes at baseline	0.181	0.012
High to low dose	−0.040
McAuley index
BMI at baseline	−0.119	<0.0001
Prediabetes at baseline	−0.089
High to low dose	0.031
Model 33
lnHOMA index
BMI at baseline	0.020	0.004
Concentration at baseline	0.571	<0.0001
High to low dose	0.001
McAuley index
BMI at baseline	−0.037	0.041
Concentration at baseline	0.658	<0.0001
High to low dose	−0.094
Model 44
lnHOMA index
BMI at baseline	0.020	0.004
Concentration at baseline	0.559	<0.0001
McAuley index
BMI at baseline	−0.038	0.036
Concentration at baseline	0.645	<0.0001

¹Adjusted for BMI (in kg/m²) index of insulin resistance and vitamin D dose.

²Adjusted for BMI, prediabetes, and vitamin D dose.

³Adjusted as for model 1 and for age and statin use.

⁴Adjusted as for model 3 but covariates entered stepwise.