TABLE 8.

Summary of forest plot analyses of the effect of zinc supplementation in infants and children aged ≤3 y on iron deficiency anemia (OR), analyzed by duration, chemical formula, and comparator group¹

		References	Mean difference	95% CI	P	I 2
By treatment duration	>3 mo	(29, 34, 39, 47, 71, 74)	1.01	0.73, 1.39	0.97	20
By chemical formula	Zn sulfate	(29, 34, 39, 47, 71)	0.99	0.68, 1.44		34
	Not stated	(74)	1.46	0.42, 5.06		0
	Overall		1.01	0.73, 1.39	0.97	20
Zinc vs. placebo		(29, 39, 71, 74)	0.98	0.67, 1.45	0.93	20
High-dose vs. low-dose		(74)	4.93	0.56, 43.27	0.15	NA

¹NA, not applicable.