Trial | Intervention | Effect of Zinc Acetate on Common Cold Durationa (95% CI) | |||||
---|---|---|---|---|---|---|---|
Zinc | Placebo | ||||||
No. of Colds | Mean Duration of Colds (Days) | SD | No. of Colds | Mean Duration of Colds (Days) | SD | ||
Petrus et al. 1998 [22]b | 52 | 3.80 | 1.63 | 49 | 5.10 | 2.96 | -26% (-44%, -7%) |
Prasad et al. 2000 [25] | 25 | 4.5 | 1.6 | 23 | 8.1 | 1.8 | -44% (-56%, -33%) |
Prasad et al. 2008 [21] | 25 | 4.00 | 1.04 | 25 | 7.12 | 1.26 | -44% (-53%, -35%) |
Pooled results | 102 | 97 | -42% (-48%, -35%) |