Table A1.

Results of regression analyses regarding the role of inflammation parameters (CRP, IL-6, WBC) as possible moderator for the association of vitamin D concentrations and depression (CES-D Score).

	Model 1 (without Covariables)			Model 2 (with Covariables)
	b (95% CI)	beta	p	b (95% CI)	beta	p
CRP levels as moderator
Vitamin D level	−0.040 (−0.055; −0.025)	−0.066	<0.0001	−0.022 (−0.037; −0.007)	0.037	0.0035
CRP level	0.116 (0.067; 0.116)	0.089	<0.0001	0.060 (0.012; 0.108)	0.046	0.0143
Vitamin D × CRP interaction	−0.002 (−0.003; 0.000)	−0.033	0.0942	−0.001 (−0.003; 0.001)	−0.024	0.2130
IL−6 levels as moderator
Vitamin D level	−0.038 (−0.064; −0.012)	−0.066	0.0045	−0.015 (−0.040; 0.011)	−0.026	0.2588
IL−6 level	0.167 (0.063; 0.271)	0.109	0.0016	0.119 (0.020; 0.218)	0.078	0.0184
Vitamin D × IL−6 interaction	−0.003 (−0.007; 0.001)	−0.061	0.1068	−0.002 (−0.006; 0.001)	−0.045	0.2133
WBC count as moderator
Vitamin D level	0.009 (−0.041; 0.059)	0.015	0.7294	−0.004 (−0.053; 0.044)	−0.007	0.8581
WBC count	0.557 (0.361; 0.753)	0.143	<0.0001	0.261 (0.067; 0.455)	0.067	0.0083
Vitamin D × WBC interaction	−0.008 (−0.016; 0.000)	−0.096	0.0389	−0.003 (−0.011; 0.004)	−0.040	0.3794

b: unstandardized regression coefficient; beta: standardized regression coefficient; CI: confidence interval; p: p value. The results of different linear regression models are given both models without any covariates and models with covariates (age, gender, socio-economic status, family status, body mass index (BMI) score, smoking status, alcohol consumption and the season in which vitamin D concentrations had been measured).