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

Table 4 Multivariate meta-regression model

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 concentration^ϑ	− 0.044	− 0.06, − 0.02	0.00*

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

ISSN: 2046-4053