Gender-related differences in the association of serum levels of vitamin D with body mass index in northern Iranian population: the PERSIAN Guilan Cohort Study (PGCS)

Table 3 Linear regression analysis of BMI associated with serum 25-hydroxyvitamin D stratified by gender

BMI (kg /m)2	Serum 25-hydroxyvitamin D (nmol/L)
	all			male			female
	Regression coefficients (B)	95% confidence interval	P-value	Regression coefficients (B)	95% confidence interval	P-value	Regression coefficients (B)	95% confidence interval	*P-value*
Model 1	-0.09	-0.1 to -0.04	< 0.001	-0.19	-0.2 to-0.1	< 0.001	-0.06	-0.1 to 0.01	0.09
Model 2	-0.06	-0.1 to -0.006	0.03	-0.16	-0.2 to -0.07	< 0.001	-0.003	-0.08 to 0.07	0.9
Model 3	-0.05	-0.1 to 0	0.05	-0.14	-0.2 to -0.06	0.001	-0.005	-0.08 to 0.07	0.8

Model 1: crude model. Model 2: model 1 adjusted for age, sex, residency and educational level. Model 3: model 2 additionally adjusted for physical activity (METhrs /day), alcohol use, and smoking and Vitamin D supplementation

ISSN: 2055-0928