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Cancer mortality reduction and metformin: a retrospective cohort study in type 2 diabetic patients

Aims: Few studies suggest that metformin decreases cancer mortality in type‐2 diabetic patients (T2DP). We explored the association between the type and duration of antidiabetic therapies and cancer and other‐than‐cancer mortality in a T2DP cohort, taking into account the competing risks between different causes of death and multiple potential confounding effects. The mortality rates were compared with the general population from the same area.