Version May 29, 2012
1 | Selection of trials is based on an arbirary and illogical scoring system |
2 | No P-values extracted from papers or calculated by Kleijnen himself |
3 | No calculation of effect measured (RR or perventage benefit) |
4 | No pooling of data from comparable trials |
5 | No consideration of what might explain differences between trial results |
6 | No consideration of vitamin C intake in diet |
7 | No consideration of vitamin C supplementary doses |
8 | No partition of regular supplementation trials from therapeutic supplementation trials |
9 | No consideration of biological plausibility (i.e., immune system effects, animal studies, changes in vitamin C metabolism during colds, etc.) |