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. 2011 Dec;34(12):2542-4.
doi: 10.2337/dc11-1199. Epub 2011 Oct 4.

Risk of breast cancer after onset of type 2 diabetes: evidence of detection bias in postmenopausal women

Samantha L Bowker  1 , Kathryn Richardson, Carlo A Marra, Jeffrey A Johnson
Affiliations

Risk of breast cancer after onset of type 2 diabetes: evidence of detection bias in postmenopausal women

Samantha L Bowker et al. Diabetes Care. 2011 Dec.

Abstract

Objective: To examine the risk of breast cancer in pre- and postmenopausal women with type 2 diabetes (T2D).

Research design and methods: This was a population-based retrospective cohort study. Cox regression, stratified by pre- (<55 years) and postmenopausal (≥55 years) status, was used to estimate hazard ratios (HRs) for breast cancer, during earlier (0-3 months) and later (3 months to 10 years) time windows after diabetes index date.

Results: Compared with women without T2D, HRs for breast cancer were 0.95 (95% CI 0.48-1.86; P = 0.88) and 1.31 (0.92-1.86; P = 0.14) in pre- and postmenopausal women with T2D, respectively, in the early time window, and 0.92 (0.75-1.13; P = 0.45) and 1.00 (0.90-1.11; P = 0.93) in pre- and postmenopausal women with T2D, respectively, in the later time window.

Conclusions: We observed a trend toward an increased risk of breast cancer in postmenopausal women with T2D, but only in the time period immediately after diabetes index date.

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References

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