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We read with great interest, the recent article titled ‘Metformin decreases hepatocellular carcinoma risk in a dose-dependent manner: population-based and in vitro studies’ by Chen and colleagues published online in July in Gut.1 In this large, population-based, case-control study using the Taiwanese National Health Insurance Research Database, they reported that in patients with diabetes mellitus (DM), metformin use is associated with a decrease in the risk of hepatocellular cancer (HCC) in a dose- and duration-dependent manner. Metformin users had a 21% lower risk of HCC on multivariate stratified analysis, after adjusting for potential confounders (age, gender, hepatitis B, hepatitis C, liver cirrhosis, DM duration and antidiabetic therapy). …
Contributors Both authors have contributed equally to the drafting of this letter.
Competing interests None.
Provenance and peer review Not commissioned; internally peer reviewed.