Retrospective 26,508 consecutive COVID+ veterans in the USA, showing lower mortality with multiple treatments including metformin. Treatment was defined as drugs administered ≥50% of the time within 2 weeks post-COVID+, and may be a continuation of prophylactic treatment in some cases, and may be early or late treatment in other cases. Further reduction in mortality was seen with combinations of treatments.
risk of death, 67.0% lower, RR 0.33, p < 0.001, treatment 73 of 3,956 (1.8%), control 1,539 of 22,552 (6.8%), NNT 20, adjusted per study, day 30.
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Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
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Hunt et al., 6/29/2022, retrospective, USA, peer-reviewed, 8 authors, study period 1 March, 2020 - 10 September, 2020.