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

Table 3 Univariable meta-regression model

Trial level covariate	Estimate	95% CI	P value	Tau²	R²	I²
Dose, IU	0.02	− 0.0, 0.5	0.02 *	115.7	20.5	96.1
Baseline 25(OH)D concentration, nmol/L	− 0.09	− 0.4, 0.2	0.54	142.7	0.0	96.3
Latitude	0.26	− 0.2, 0.7	0.23	142.2	2.1	96.1

Tau² unexplained between-study variance, R² proportion of total between-study variance explained by the model, I² between studies variance, *Statistically significant

ISSN: 2046-4053