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Table 8 Multiple logistic regression results: showing predictors of developing Vitamin D Deficiency through Odds Ratios (ORs), 95% Confidence Intervals (CIs) and statistical significance of variables (p value)

From: Epidemiology and risk factors of hypovitaminosis D in a cohort of internationally adopted children: a retrospective study

Variable Value OR 95% CI p value
Skin color Very fair / fair (ref)    
Intermediate 1.014 0.590–1.743 0.96
Olive / Brown 2.387 1.261–4.519 0.08
Season at 1st evaluation Spring (ref)    
Summer 0.207 0.104–0.410 < 0.001
Fall 0.726 0.362–1.455 0.366
Winter 1.000 0.485–2.063 1.000
Housing solution Foster home (ref)    
Foster family 0.252 0.125–0.507 < 0.001
Orphanage 3.971 1.971–8.001 <  0.001
ALP status Normal a (ref)    
Increased a 0.560 0.338–0.930 0.025
Age at 1st evaluation Continuous variable 1.238 1.140–1.345 <  0.001
  1. ALP Alkaline phosphatase
  2. a Normal values are extensively described in the “Subjects and methods” section