Table 2.

Multivariate logistic regression analysis of vitamin D deficiency [serum 25 (OH)D < 20 ng/ml].

VariableEstimateSEpOR
Disease (autoimmune disorders)0.410.210.042.3
Season (fall, winter, and spring)1.140.390.0039.8
Ethnicity (white)−1.040.19< 0.00010.1
Body mass index (nonobese)−0.500.230.030.4
Supplementation (none)0.790.330.024.9