Active and passive cigarette smoking and the risk of endometrial cancer in Poland.
BACKGROUND
Epidemiological studies have consistently reported that active cigarette smoking is inversely associated with endometrial cancer risk. However, dose-response relationships with quantitative measures of active smoking or passive smoking remain less clear.


METHODS
Data on lifetime active and passive smoking were collected for 551 endometrial cancer cases and 1925 controls in a population-based case-control study conducted during 2001-2003 in Poland (Warsaw and Łódz).


RESULTS
Compared with never active smokers, active current (Odds Ratio (OR)=0.51, 95% Confidence Interval (CI): 0.39, 0.68) and former smokers (OR=0.60, 95% CI: 0.45, 0.80) were at a statistically significantly decreased risk. We did not observe statistically significant inverse dose-response relationships with increasing exposure with duration and cumulative measures. However, there was some indication that the highest category of number of years (OR=0.35, 95% CI: 0.23-0.55), intensity (OR=0.41, 95% CI: 0.24-0.69), and dose (OR=0.38, 95% CI: 0.24-0.60) of smoking among current smokers had the greatest inverse association compared to never smokers. Our data did not support the presence of an inverse association with passive smoking among never active smokers (OR=0.92; 95% CI: 0.65, 1.29).


CONCLUSIONS
Our results support that long-term and heavy smoking among current smokers strongly influence endometrial cancer risk.
Yang
Hannah P
HP
Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, 6120 Executive Blvd, Suite 520, Rockville, MD 20852, USA. yanghan@mail.nih.gov
Brinton
Louise A
LA
Platz
Elizabeth A
EA
Lissowska
Jolanta
J
Lacey
James V
JV
Sherman
Mark E
ME
Peplonska
Beata
B
Garcia-Closas
Montserrat
M
D000328:Adult; D000367:Age Factors; D000368:Aged; D016022:Case-Control Studies; D016889:Endometrial Neoplasms / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects* / Q000453:epidemiology; D016540:Smoking Cessation / Q000706:statistics & numerical data; D013997:Time Factors; D014028:Tobacco Smoke Pollution / Q000009:adverse effects* / Q000706:statistics & numerical data; D055815:Young Adult
D014028:Tobacco Smoke Pollution