Pioglitazone and bladder cancer: A propensity score matched cohort study.
Summary of "Pioglitazone and bladder cancer: A propensity score matched cohort study."
To examine whether exposure to pioglitazone use is associated with increased incidence of bladder cancer in patients with type 2 diabetes mellitus.
A cohort study was done in the General Practice Research Database (GPRD) between 2001 and 2010. 207,714 patients aged ≥40 years with type 2 diabetes were studied (23,548 exposed to pioglitazone and 184,166 exposed to other antidiabetic medications but not pioglitazone). The association between pioglitazone and risk of bladder cancer was assessed by a Cox regression model. A propensity score matched analysis was done in a group of patients without missing baseline characteristics data.
66 and 803 new cases of bladder cancer occurred in the pioglitazone and other group respectively (rates of 80.2 (95%CI 60.8-99.5) and 81.8 (95%CI 76.2-87.5) per 100,000 person-years respectively). Pioglitazone did not increase the risk of bladder cancer significantly compared with other antidiabetic drugs treatment group, (adjusted hazard ratio (HR), 1.16, 95%CI 0.83-1.62). In a matched propensity score analysis in which both groups had similar baseline characteristics (17,249 patients in each group), the adjusted HR was 1.22 (95% CI 0.80-1.84).
The results suggest that pioglitazone may not be significantly associated with an increased risk of bladder cancer in patients with type 2 diabetes. © 2012 The Authors. British Journal of Clinical Pharmacology © 2012 The British Pharmacological Society.
Medicines Monitoring Unit (MEMO), Division of Medicine and Therapeutics, Ninewells Hospital and Medical School, Dundee, DD1 9SY, UK.
This article was published in the following journal.
Name: British journal of clinical pharmacology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22574756
- DOI: http://dx.doi.org/10.1111/j.1365-2125.2012.04325.x
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