SynthesisThe oncologist2012

Cancer risk associated with use of metformin and sulfonylurea in type 2 diabetes: a meta-analysis.

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

Correlation, not cause

−39%−46% to −30%

Bigger than 7 in 10 for adverse events & safety

As reported

RR 0.61, 95% CI 0.54–0.70

the abstract, start to end

… decreased RR of all cancers (summary RR 0.61, 95% confidence interval [CI] …

← favours treatmentfavours comparator →

could be chance

Adverse events & safety

RR 0.610.54–0.70

MetforminAdverse events & safety

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this paperpooled ittrialcites it