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J Cancer Epidemiol. 2017;2017:7574946. doi: 10.1155/2017/7574946. Epub 2017 Aug 15.

Racial and Socioeconomic Disparities Are More Pronounced in Inflammatory Breast Cancer Than Other Breast Cancers.

Author information

1
Medical Scientist Training Program, University of Wisconsin, 6068 WIMR, 1111 Highland Avenue, Madison, WI 53705, USA.
2
University of Wisconsin Carbone Cancer Center, 610 Walnut Street, Room 307, WARF Building, Madison, WI 53726, USA.
3
Department of Radiation Oncology, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA.
4
University of Virginia School of Medicine, West Complex MSB, Room 6203E, 1300 Jefferson Park Ave, Charlottesville, VA 22908, USA.
5
Public Health Institute, Cancer Registry of Greater California, Department of Public Health Sciences, UC Davis School of Medicine, 4610 X St, Davis, CA 95817, USA.
6
College of Public Health, University of Kentucky, 111 Washington Avenue, Lexington, KY 40536, USA.
7
Rollins School of Public Health and Winship Cancer Institute, Emory University, 1518 Clifton Road, Atlanta, GA 30322, USA.
8
LSU Health Sciences Center School of Public Health, 2020 Gravier Street, 3rd Floor, New Orleans, LA 70112, USA.
9
Department of Population Health Sciences, University of Wisconsin Carbone Cancer Center, 610 Walnut Street, Room 307, WARF Building, Madison, WI 53726, USA.

Abstract

Inflammatory breast cancer (IBC) is a rare yet aggressive form of breast cancer. We examined differences in patient demographics and outcomes in IBC compared to locally advanced breast cancer (LABC) and all other breast cancer patients from the Breast and Prostate Cancer Data Quality and Patterns of Care Study (POC-BP), containing information from cancer registries in seven states. Out of 7,624 cases of invasive carcinoma, IBC and LABC accounted for 2.2% (N = 170) and 4.9% (N = 375), respectively. IBC patients were more likely to have a higher number (P = 0.03) and severity (P = 0.01) of comorbidities than other breast cancer patients. Among IBC patients, a higher percentage of patients with metastatic disease versus nonmetastatic disease were black, on Medicaid, and from areas of higher poverty and more urban areas. Black and Hispanic IBC patients had worse overall and breast cancer-specific survival than white patients; moreover, IBC patients with Medicaid, patients from urban areas, and patients from areas of higher poverty and lower education had worse outcomes. These data highlight the effects of disparities in race and socioeconomic status on the incidence of IBC as well as IBC outcomes. Further work is needed to reveal the causes behind these disparities and methods to improve IBC outcomes.

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