TABLE 14.
Summary of forest plot analyses of the effect of zinc supplementation in infants and children aged ≤3 y on serum iron concentration (μg/dL), analyzed by duration, chemical formula, and comparator group1
| References | Mean difference | 95% CI | P | I 2 | ||
|---|---|---|---|---|---|---|
| By treatment duration | 0–3 mo | (51) | −0.12 | −11.16, 10.92 | NA | |
| >3 mo | (65) | 12.50 | 10.37, 14.63 | NA | ||
| Overall | 7.40 | −4.74, 19.54 | 0.23 | 79 | ||
| By chemical formula | Zn sulfate | (51, 65) | 7.40 | −4.74, 19.54 | 0.23 | 79 |
| Zinc vs. placebo | (65) | 12.50 | 10.37, 14.63 | <0.001 | NA |
1
NA, not applicable.