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Table 4 Results of a multiple linear regression analysis on determinants of serum 25(OH)D in women (n = 3,004)

From: Vitamin D status among adults in Germany – results from the German Health Interview and Examination Survey for Adults (DEGS1)

Variable B SE p-value
Intercept 51.535 2.946 0.000
Age (per year) −0.132 0.032 0.000
Season (ref. winter)    
 Spring 5.860 1.182 0.000
 Summer 24.515 1.269 0.000
 Autumn 16.847 1.118 0.000
Latitude (ref. 52°-54°)    
 47°-49° 4.286 1.137 0.000
 50°-51° −0.005 1.050 0.996
Vitamin D intake index (ref. low intake)    
 Intermediate intake −0.378 0.979 0.700
 Higher intake 2.013 1.041 0.053
Vitamin D supplement use 13.015 1.816 0.000
Oral contraceptive use 7.081 1.252 0.000
Use of postmenopausal hormone therapy 3.572 2.154 0.097
Body Mass Index (kg/m2) −0.709 0.081 0.000
Socio-economic status (ref. low)    
 Middle 4.467 1.116 0.000
 High 4.575 1.405 0.001
Sport activity (ref. no activity)    
 <2 h per week 2.676 0.971 0.006
 > = 2 h per week 7.243 1.171 0.000
Media use (ref. up to 1 h per day)    
TV, DVD, video    
 1- < 3 h −0.773 1.134 0.495
 > = 3 h −2.294 1.564 0.142
Computer, Internet, computer games, game consoles    
 1- < 3 h −1.005 1.094 0.359
 > = 3 h −4.861 1.904 0.011
Residential traffic    
Living near a road with…    
(ref. very little traffic)    
 Fair amount or quite a lot of traffic −0.433 0.938 0.644
 Heavy or extremely heavy traffic −2.076 1.096 0.058
corr. r2 = 0.226    
  1. 25(OH)D 25-hydroxy-vitamin D, ref. reference