[Matched case-control study for detecting risk factors of breast cancer in women living in Chengdu].
OBJECTIVE
To detect the risk factors of breast cancer in women living in Chengdu in order to identify high risk population and to conduct proper interventions.


METHODS
A matched case-control study was performed in 265 cases with breast cancer who lived in this area.


RESULTS
In the univariate analysis, menarche to menopause period > or = 35 years, taking oral contraceptives, history of benign breast diseases, passive smoking, and syrup drinking are the statistically significant risk factors of breast cancer, whereas breast feeding and soybean food consumption are protective factors. Conditional logistic multivariate analysis revealed that history of benign breast diseases and passive smoking are risk factors while soybean food products and breast feeding are protective factors.


CONCLUSIONS
The risk factors of breast cancer in women living in Chengdu are history of benign breast diseases and passive smoking.
Zhao
Y
Y
First University Hospital, West China University of Medical Sciences, Chengdu.
Shi
Z
Z
Liu
L
L
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000453:epidemiology*; D016022:Case-Control Studies; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D016015:Logistic Models; D008875:Middle Aged; D015999:Multivariate Analysis; D012307:Risk Factors; D011795:Surveys and Questionnaires