Version May 29, 2012
Trial | Ascorbic acid | Placebo | |||
---|---|---|---|---|---|
No. of subjects | Mean duration (days) | No. of subjects | Mean duration (days) | Difference in duration (days) | |
Anderson-1972 | 407 | 3.96 | 411 | 4.18 | 0.22 |
Anderson-1974 | 583 | 3.28 | 578 | 3.18 | -0.10 |
Coulehan-1974 | 321 | 4.71 | 320 | 5.92 | 1.21 |
Wilson-1973 | 158 | 2.65 | 144 | 2.79 | 0.14 |
Karlowski-1974 | 101 | 6.80 | 89 | 6.30 | 0.50 |
Cowan-1942 | 233 | 1.10 | 194 | 1.60 | 0.50 |
Cowan-1942 | 227 | 1.70 | 120 | 1.00 | -0.70 |
Mean for the above: | 0.11 ± 0.24 (SE) | ||||
Ritzel-1961 | 139 | 1.35 | 140 | 1.95 | 0.60 |