Body mass, diabetes and smoking, and endometrial cancer risk: a follow-up study

K. Lindemann,L. Vatten,Marie Ellstrøm-Engh,A. Eskild

Published 2008 in British Journal of Cancer

ABSTRACT

We examined the relationship of body mass index (BMI), diabetes and smoking to endometrial cancer risk in a cohort of 36 761 Norwegian women during 15.7 years of follow-up. In multivariable analyses of 222 incident cases of endometrial cancer, identified by linkage to the Norwegian Cancer Registry, there was a strong increase in risk with increasing BMI (P-trend <0.001). Compared to the reference (BMI 20–24 kg m−2), the adjusted relative risk (RR) was 0.53 (95% confidence interval (CI): 0.19–1.47) for BMI<20 kg m−2, 4.28 (95% CI: 2.58–7.09) for BMI of 35–39 kg m−2 and 6.36 (95% CI: 3.08–13.16) for BMI⩾40 kg m−2. Women with known diabetes at baseline were at three-fold higher risk (RR 3.13, 95% CI: 1.92–5.11) than those without diabetes; women who reported current smoking at baseline were at reduced risk compared to never smokers (RR 0.55, 95% CI: 0.35–0.86). The strong linear positive association of BMI with endometrial cancer risk and a strongly increased risk among women with diabetes suggest that any increase in body mass in the female population will increase endometrial cancer incidence.

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