SynthesisBritish journal of clinical pharmacology2022

Does metformin affect outcomes in COVID-19 patients with new or pre-existing diabetes mellitus? A systematic review and meta-analysis.

What moved togetherboth groups pooled, not the treatment’s effect

Correlation, not cause

−39%−47% to −29%

Bigger than 9 in 10 for all-cause mortality

As reported

OR 0.61, 95% CI 0.53–0.71 · the paper's word: All-cause mortality

the abstract, start to end

… patients with DM in both unadjusted (OR 0.61 [95% confidence interval: …

← favours treatmentfavours comparator →

could be chance

All-cause mortality

OR 0.610.53–0.71

MetforminAll-cause mortality

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