Variation in breast cancer care quality in New York and California based on race/ethnicity and Medicaid enrollment

• Published in: Cancer Vol. 122; no. 3; pp. 420 - 431
• Main Authors: Hassett, Michael J., Schymura, Maria J., Chen, Kun, Boscoe, Francis P., Gesten, Foster C., Schrag, Deborah
• Format: Journal Article
• Language: English
• Published: United States 01.02.2016
• Subjects: Adult; African Americans - statistics & numerical data; Aged; Asian Americans - statistics & numerical data; breast cancer; Breast Neoplasms - economics; Breast Neoplasms - ethnology; Breast Neoplasms - pathology; Breast Neoplasms - therapy; California; disparities; Female; Healthcare Disparities - statistics & numerical data; Hispanic Americans - statistics & numerical data; Humans; Medicaid; Middle Aged; Neoplasm Grading; Neoplasm Staging; New York; Oceanic Ancestry Group - statistics & numerical data; quality; Quality of Health Care - standards; Registries; United States; New York; United States; California; disparities; breast cancer; Medicaid; quality
• ISSN: 0008-543X; 1097-0142
• DOI: 10.1002/cncr.29777

BACKGROUND Racial/ethnic and socioeconomic disparities persist in part because our current understanding of the care provided to minority and disadvantaged populations is limited. The authors evaluated the quality of breast cancer care in 2 large states to understand the disparities experienced by African Americans, Hispanics, Asian/Pacific Islanders (APIs), and Medicaid enrollees and to prioritize remediation strategies. METHODS Statewide cancer registry data for 80,436 women in New York and 121,233 women in California who were diagnosed during 2004 to 2009 with stage 0 through III breast cancer were used to assess underuse and overuse of surgery, radiation, chemotherapy, and hormone therapy based on 34 quality measures. Concordance values were compared across racial/ethnic and Medicaid‐enrollment groups. Multivariable models were used to quantify disparities across groups for each treatment in each state. RESULTS Overall concordance was 76% for underuse measures and 87% for overuse measures. The proportions of patients who received care concordant with all relevant measures were 35% in New York and 33% in California. Compared with whites, African Americans were less likely to receive recommended surgery, radiation, and hormone therapy; Hispanics and APIs were usually more likely to receive recommended chemotherapy. Across states, the same racial/ethnic groups did not always experience the same disparities. Medicaid enrollment was associated with decreased likelihood of receiving all recommended treatments, except chemotherapy, in both states. Overuse was evident for hormone therapy and axillary surgery but was not associated with race/ethnicity or Medicaid enrollment. CONCLUSIONS Patient‐level measures of quality identify substantial problems with care quality and meaningful disparities. Remediating these problems will require prioritizing low‐performing measures and targeting high‐risk populations, possibly in different ways for different regions. Cancer 2016;122:420–431. © 2015 American Cancer Society. Thirty‐four quality measures that span all aspects of initial breast cancer care are used to assess the underuse of recommended therapies and the overuse of unnecessary therapies for large numbers of African Americans, Hispanics, Asian/Pacific Islanders, and Medicaid enrollees. The results indicate that remediation strategies should focus on socioeconomically disadvantaged populations but also must consider regional variations in practice performance.