Table 4 Determination of the factors specifically related to vitD deficiency (univariate regression analysis procedures)

Odds ratio (CI_95%)

p-value

Gender (male)

1.64 [0.38 – 7.13]

0.51

Age (≥25 years)

1.6 [0.41 – 6.19]

0.5

Phototype (IV to VI)

4.6 [1.11 – 19.14]

0.04

Erythema (VAS ≥ 5/10)

0.8 [0.14 – 4.66]

0.8

Scaling (VAS ≥ 5/ 10)

5.6 [1.31 – 24]

0.02

Ichthyosis global severity (severe -very severe)

8 [1.79 – 35.75]

<0.01

Systemic therapy (acitretin)

3.25 [0.66 – 16.04]

0.15

Season (winter- spring)

8.64 [1.59 – 46.81]

0.01

Sun behavior (Sun avoidance)

1.29 [0.34 – 4.86]

0.71