Study [Ref.] | No. of Participants | Zn Dose Per Day (mg)a | Average Duration of Colds (Days)b Zn/Placebo | The Effect of Zn | Pb (1-Tail) | –2×ln(P) |
---|---|---|---|---|---|---|
Eby et al.1984 [7] | 65 | 207 | 3.9/10.8c | -64%c | 0.0005c | 15.2 |
Smith et al.1989 [19] | 110 | 207 | 5.9/6.3d 5.5/6.9d |
-22%d | 0.5d 0.01d |
1.4 |
Godfrey et al. 1992 [20] | 73 | 192 | 4.9/6.1 | -21% | 0.024 | 7.4 |
Prasad et al. 2008 [21] | 50 | 92 | 4.0/7.1 | -44% | 6×10–13 | 56.3 |
Petrus et al. 1998 [22] | 101 | 89 | 3.8/5.1 | -26% | 0.0033 | 11.4 |
Turner at al. A 2000 [23] | 139 | 80 | 6.0/5.5 | 0.5 | 1.4 | |
Mossad et al.1996 [24] | 99 | 80 | 4.4/7.6 | -42% | 0.0005 | 15.2 |
Prasad et al. 2000 [25] | 48 | 80 | 4.5/8.1 | -44% | 2×10–9 | 40.0 |
Turner et al. B 2000 [23] | 139 | 69 | 5.5/5.5 | 0.5 | 1.4 | |
Douglas et al. 1987 [26] | 58e | 64 | 12.1/7.7 | 0.96 | 0.1 | |
Macknin et al. 1998 [27] | 247 | 45 | 9.0/9.0 | 0.5 | 1.4 | |
Weismann et al. 1990 [28] | 130 | 45 | 7/6 | 0.5 | 1.4 | |
Turner et al. C 2000 [23] | 143 | 30 | 6.0/5.5 | 0.5 | 1.4 |