J Gynecol Oncol.  2013 Apr;24(2):135-140. 10.3802/jgo.2013.24.2.135.

Reproductive factors for ovarian cancer in southern Chinese women

Affiliations
  • 1School of Public Health, Curtin University, Perth, WA, Australia. Andy.Lee@curtin.edu.au

Abstract


OBJECTIVE
To investigate the association between reproductive factors and the risk of ovarian cancer among southern Chinese women.
METHODS
A hospital-based case-control study was undertaken in Guangzhou, Guangdong Province, between 2006 and 2008. A structured questionnaire was used to obtain information on parity, oral contraceptive use and other reproductive factors in a sample of 500 incident ovarian cancer patients and 500 controls (mean age, 59 years). Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using unconditional logistic regression models.
RESULTS
High parity was inversely associated with ovarian cancer, with an adjusted OR 0.43 (95% CI, 0.30 to 0.62) for women who had given birth to 3 or more children compared to women who had given no more than one birth. Ever use of oral contraceptives was also protective against ovarian cancer; adjusted OR 0.56 (95% CI, 0.40 to 0.78). No association was found for hormone replacement therapy, menopausal status, hysterectomy and family history of ovarian and/or breast cancer.
CONCLUSION
High parity and oral contraceptive use are associated with a lower risk of ovarian cancer in southern Chinese women.

Keyword

China; Oral contraceptives; Ovarian cancer; Parity

MeSH Terms

Asian Continental Ancestry Group
Breast
Case-Control Studies
Child
China
Contraceptives, Oral
Female
Hormone Replacement Therapy
Humans
Hysterectomy
Logistic Models
Odds Ratio
Ovarian Neoplasms
Parity
Parturition
Surveys and Questionnaires
Contraceptives, Oral

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