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    Keywords: CANCER ; Germany ; FOLLOW-UP ; INFORMATION ; COHORT ; EPIDEMIOLOGY ; EXPOSURE ; RISK ; TIME ; REDUCTION ; RISK-FACTORS ; NO ; HEALTH ; WOMEN ; CIGARETTE-SMOKING ; PROSPECTIVE COHORT ; risk factors ; smoking ; cancer risk ; RECRUITMENT ; EPIC ; European Prospective Investigation into Cancer and Nutrition ; nutrition ; ENDOMETRIAL CANCER ; HETEROGENEITY ; POSTMENOPAUSAL WOMEN ; IGF-I ; ONCOLOGY ; ENDOMETRIAL ; RE ; WEIGHT ; prospective studies ; PHYSICAL-ACTIVITY ; EPIDEMIOLOGIC EVIDENCE ; PREMENOPAUSAL WOMEN ; sex-steroid hormones ; USA ; REPLACEMENT THERAPY ; PREMENOPAUSAL ; prospective ; prospective study ; INCREASED RISK ; NEVER SMOKERS ; RISK-FACTOR ; CANCER-RISK ; HEALTHY WOMEN ; postmenopausal
    Abstract: Current epidemiologic evidence indicates that cigarette smoking reduces the risk of endometrial cancer. We examined data from the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort to analyze further aspects of the smoking-endometrial cancer relationship, such as possible modifying effects of menopausal status, HRT use, BMI and parity. In a total of 249,986 women with smoking exposure and menopausal status information, 619 incident endometrial cancer cases were identified during 1.56 million person-years of follow-up. Among postmenopausal women, the hazard ratio (HR) for current smokers versus never smokers was 0.70 (95% CI = 0.53-0.93), while it was 1.75 (95% CI = 1.13-2.70) among premenopausal women at recruitment. After adjustment for risk factors, the HR for postmenopausal women was slightly attenuated to 0.78 (95% CI = 0.59-1.03). No heterogeneity of effect was observed with HRT use or BMI. Among premenopausal women, current smokers of more than 15 cigarettes per day or who smoked for 30 years or more at the time of recruitment had a more than 2-fold increased risk of endometrial cancer compared to never smokers (HR = 2.54; 95% CI = 1.47-4.38 and HR = 2.23; 95% CI = 1.04-4.77, respectively). Past smoking was not associated with endometrial cancer risk, either among pre- or post-menopausal women. In this prospective study, we observed an increased risk of endometrial cancer with cigarette smoking in premenopausal women. The reduction of endometrial cancer risk observed among postmenopausal women does not have direct public health relevance since cigarette smoking is the main known risk factor for cancer. (c) 2007 Wiley-Liss, Inc
    Type of Publication: Journal article published
    PubMed ID: 17657712
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