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Table 4 Multivariate meta-regression model

From: The impact of vitamin D food fortification and health outcomes in children: a systematic review and meta-regression

Trial level covariate Coefficient 95% CI P value Tau2 R2 I2
Intercept − 71.08 − 128.09, − 14.07 0.01* 37.1 76.2 80.1
Dose, IU 0.03 0.01, 0.05 0.00*
Baseline 25(OH)D concentration, nmol/L 1.26 0.31, 2.21 0.00*
Latitude 2.44 1.02, 3.87 0.001*
Latitude × baseline 25(OH)D concentrationϑ − 0.044 − 0.06, − 0.02 0.00*
  1. Tau2 unexplained between-study variance, R2 proportion of total between-study variance explained by the model, I2 between studies variance
  2. ϑInteraction term
  3. *Statistically significant