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Table 3 Reduced incidence and cancer-related mortality in metformin treated patients

From: Metformin: an old but still the best treatment for type 2 diabetes

Author

Study type

Tumor type

Region

Total participants

Follow up (years)

Confounding adjustment *

Evans [135]

Pilot Observational Study

Not specified

Tayside, Scotland. UK

11,876

8

IMC, smoking, blood pressure, material deprivation

Bodmer [136]

Retrospective Case control

Breast

UK

22,661

10

Age, BMI, smoking, estrogen use, diabetes history, HbA1c, renal failure, congestive heart failure, ischemic heart disease

Li [137]

Prospective case–control

Pancreatic

USA

1,836

4

Sex, age, smoking, DM-2, duration of diabetes, HbA1c, insulin use, oral antidiabetic medication, IMC, risk factors

Donadon [138]

Retrospective Case–control

Hepatocellular carcinoma

Italy

1,573

12

Sex, age, BMI, alcohol abuse, HBV and HCV infection, DM-2, ALT level

Libby [139]

Retrospective cohort study

Colorectal

Scotland. UK

8,000

9

Sex, age, BMI, HbA1c, deprivation

      

Other drug use

  1. *Confounding adjustment: Adjustment of variables that could potentially interfere with cancer incidence.