UNLABELLED: Patients with type 2 diabetes have increased cancer risk and cancer-related mortality, which can be reduced by metformin treatment. However, it is unclear whether metformin can also modulate clinical outcomes in patients with cancer and concurrent type 2 diabetes. PATIENTS AND METHODS: A meta-analysis of 20 publications that included 13,008 subjects was performed to investigate the association between metformin and overall survival (OS) as well as cancer-specific survival (CSS) in patients with cancer and concurrent type 2 diabetes. RESULTS: We found that there was a relative survival benefit associated with metformin treatment compared with treatment with other glucose-lowering medications in both OS and CSS (hazard ratio [HR] = 0.66; 95% confidence interval [CI]: 0.55-0.79 and HR = 0.62; 95% CI: 0.46-0.84, respectively). These associations were also observed in subgroups by cancer type and country. CONCLUSION: These results suggest that metformin is the drug of choice in the treatment of patients with cancer and concurrent type 2 diabetes.
UNLABELLED: Patients with type 2 diabetes have increased cancer risk and cancer-related mortality, which can be reduced by metformin treatment. However, it is unclear whether metformin can also modulate clinical outcomes in patients with cancer and concurrent type 2 diabetes. PATIENTS AND METHODS: A meta-analysis of 20 publications that included 13,008 subjects was performed to investigate the association between metformin and overall survival (OS) as well as cancer-specific survival (CSS) in patients with cancer and concurrent type 2 diabetes. RESULTS: We found that there was a relative survival benefit associated with metformin treatment compared with treatment with other glucose-lowering medications in both OS and CSS (hazard ratio [HR] = 0.66; 95% confidence interval [CI]: 0.55-0.79 and HR = 0.62; 95% CI: 0.46-0.84, respectively). These associations were also observed in subgroups by cancer type and country. CONCLUSION: These results suggest that metformin is the drug of choice in the treatment of patients with cancer and concurrent type 2 diabetes.
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