Table 4 Factors associated with severe hypovitaminosis D (< 10 ng/L) in multivariate analysis (final model - logistic regression)

Sun exposure (/+1 hour)

0.84

0.74-0.94

0.03

Past history of falls (yes vs. no)

1.80

1.00-3.27

0.05

Past smokers (yes vs. no)

2.74

1.17-6.43

0.02

Active smokers (yes vs. no)

2.63

1.27-5.45

0.009

Co-infections

Positive HCV serology (positive vs. negative)

1.87

0.92-3.85

0.09

Positive anti-HBc and negative anti-HBs (yes vs. no)

2.76

1.17-6.54

0.005

Biological markers

IL-6 (+1 pg/mL)

1.13

1.02-1.25

0.02

High serum CTX (yes vs. no)

2.44

1.23-4.81

0.01