Table 5.

Association between respiratory tract infections within the first 6 months of age and cord blood concentrations of 25(OH)D according to the multivariate logistic regression analysis models

Multivariate logistic model 1 was adjusted for multivitamin use during pregnancy (yes/no) and season of birth (spring, summer, autumn, or winter); multivariate logistic model 2 was adjusted for multivitamin use during pregnancy (yes/no), season of birth (spring, summer, autumn, or winter), and exposure to passive smoking during pregnancy (yes/no). 25(OH)D, 25-hydroxyvitamin D; OR, odds ratio; CI, confidence interval.