Serum 25-hydroxyvitamin D3 levels and vitamin D receptor variants in melanoma patients from the Mediterranean area of Barcelona

Table 3 Multivariate models for prediction of presence of low levels of 25-Hydroxyvitamin D3

N Model	Variables	OR (95%CI)	P
1	Season blood sampling (October- March)	3.25 (1.17-9.03)	0.024
	Skin phototype (Fair)	2.21 (0.81- 6.04)	0.123
2	Season blood sampling (October- March)	3.3 (1.17- 9.27)	0.024
	Skin phototype (Fair)	2.33 (0.84- 6.46)	0.105
	Gender (Male)	1.88 (0.68- 5.21)	0.227

Model 1. Estimation of presence of low levels of 25-Hydroxyvitamin D3 by season blood sampling adjusted by skin phototype.
Model 2. Estimation of presence of low levels of 25-Hydroxyvitamin D3 by season blood sampling adjusted by skin phototype and gender.
Multivariate logistic regression models for estimation of presence of low levels of 25-Hydroxyvitamin D3 suggest that season blood sampling in autumn-winter (October-March) months is the only predictor of low 25-Hydroxyvitamin D3, independently from skin phototype and gender.

ISSN: 1471-2350