Smoking and other risk factors for bladder cancer in women.
BACKGROUND
Bladder cancer is three to five times more frequent in men than in women, and hence only a few studies have focused only on females.


METHODS
A case-control study was conducted between 1985 and 1992 in two areas of northern Italy, and included 110 women with histologically confirmed bladder cancer and 298 controls, admitted to the same network of hospitals of cases for acute, non-neoplastic, non-urinary or genital tract diseases. Multivariate odds ratios (ORs) were computed using unconditional multiple logistic regression.


RESULTS
Compared to never smokers, current smokers (OR = 2.87) had significantly elevated risks of bladder cancer. High intake of vegetables was inversely related to the disease (OR = 0.32), while history of occupation in chemical, dyes/paints or pharmaceutical industry (OR = 3.01) was directly associated to risk of bladder cancer. The OR was 3.29 for ever use of menopause hormone replacement therapy.


CONCLUSIONS
This study confirms that cigarette smoking is the prominent risk factor for bladder cancer in women as in men, with similar relations in both sexes. It also confirms that selected occupational factors are related to bladder cancer risk, and supports a favourable role of vegetables. The apparent relation with hormone replacement therapy in menopause needs interpretation and further investigation.
Istituto di Ricerche Farmacologiche Mario Negri 20157, Milan, Italy. pelucchi@marionegri.it
Claudio
C
Pelucchi
Carlo
C
La Vecchia
Eva
E
Negri
Luigino
L
Dal Maso
Silvia
S
Franceschi
D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D004032:Diet; D005260:Female; D006801:Humans; D007558:Italy / Q000453:epidemiology; D008875:Middle Aged; D012307:Risk Factors; D012737:Sex Factors; D012907:Smoking / Q000009:adverse effects*; D011795:Surveys and Questionnaires; D001749:Urinary Bladder Neoplasms / Q000453:epidemiology* / Q000209:etiology*