Retrospective 152 mechanically ventilated patients in the USA showing unadjusted lower mortality with vitamin C, vitamin D, HCQ, and zinc treatment, statistically significant only for vitamin C.
risk of death, 30.7% lower, RR 0.69, p = 0.04, treatment 40 of 79 (50.6%), control 52 of 73 (71.2%), NNT 4.9, odds ratio converted to relative risk.
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Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
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This study is excluded in the after exclusion results of meta
analysis:
unadjusted results with no group details.
Krishnan et al., 7/20/2020, retrospective, USA, North America, peer-reviewed, 13 authors.