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Table 4 Association of vitamin D intervention with hypovitaminosis D

From: Association of serum 25-Hydroxyvitamin D with Vitamin D intervention and outdoor activity among children in North China: an observational study

Intervention Model 1 Model 2 Model 3
No intervention 1 1 1
Supplementation intervention 0.435 (0.415, 0.455) 0.435 (0.415, 0.455) 0.423 (0.404, 0.443)
Therapeutic intervention 0.202 (0.191, 0.214) 0.202 (0.191, 0.214) 0.191 (0.180, 0.202)
  1. Associations were examined with multivariable logistic regression. Model 1: adjusted for age and sex. Model 2: adjusted for BMI for age on the basis of model 1. Model 3: adjusted for season and outdoor time on the basis of model 2