Table 4.

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

		Odds-ratio	95% Confidence Interval	p value
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

HCV: Hepatitis C Virus; HBV Hepatitis B Virus; hsCRP: highly-sensitive C-Reactive Protein; IL6: Interleukin 6; High serum CTX = C Telopeptide X > 0.748 ng/ml (men), 0.738 ng/ml (pre-menopausal women), and 1.351 ng/ml (menopausal women).