Abstract
Objectives
Despite the lack of effective screening, almost 20% of women with ovarian cancer are diagnosed at an early stage of disease, when the prognosis is favorable. This study sought to elucidate tumor-related, census-based socioeconomic indicators, and demographic characteristics associated with early diagnosis of epithelial ovarian cancer (EOC).
Methods
The study population included 16,228 women diagnosed with epithelial ovarian cancer from 1996 through 2006 and reported to the California Cancer Registry. Women diagnosed with stage I tumors were compared to those diagnosed with stage III or IV disease with respect to several demographic and tumor-related characteristics. Logistic regression was used to estimate adjusted odds ratios (OR) and associated 95% confidence intervals.
Results
Age at diagnosis, tumor histology, tumor size, laterality, and grade were all strongly associated with EOC early stage at diagnosis. However, after adjusting for all relevant factors in this study, other disparities were detected. Compared with white women, the likelihood of being diagnosed with early-stage disease was significantly lower among African Americans (OR = 0.78, 95% CI = 0.55–0.92), and significantly higher among women with private insurance compared to those either uninsured or covered by Medicaid (OR = 1.6, 95% CI = 1.18–2.05).
Conclusion
These findings suggest that, in addition to tumor biology, disparities in access to care may have a significant effect on the timely diagnosis of epithelial ovarian cancer.
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Acknowledgments
The California Cancer Registry (CCR) is a collaborative effort between the California Department of Public Health (CDPH) and the Public Health Institute (PHI). The collection of cancer incidence data used in this study was supported by the CDPH as part of the statewide cancer reporting program mandated by the California Health and Safety Code Section 103885; the National Cancer Institute’s (NCI) Surveillance, Epidemiology, and End Results (SEER) Program under contract N01-PC-35136 awarded to the Northern California Cancer Center, contract N01-PC-35139 awarded to the University of Southern California, and contract N01-PC-54404 awarded to PHI; and the Centers for Disease Control and Prevention’s (CDC) National Program of Cancer Registries, under agreement No. 1U58DP00807-01 awarded to PHI. The ideas and opinions expressed herein are those of the author(s), and endorsement by CDPH, NCI, and CDC or their contractors and subcontractors is not intended nor should be inferred.
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Morris, C.R., Sands, M.T. & Smith, L.H. Ovarian cancer: predictors of early-stage diagnosis. Cancer Causes Control 21, 1203–1211 (2010). https://doi.org/10.1007/s10552-010-9547-0
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DOI: https://doi.org/10.1007/s10552-010-9547-0