The Validity of Race and Ethnicity in Enrollment Data for Medicare Beneficiaries Alan M. Zaslavsky, John Z. Ayanian and Lawrence B. Zaborski, VOLUME 47 | NUMBER 3.2 | JUNE 2012.

Keywords: Medicare;race;ethnicity;disparities;CAHPS

Objective: To assess the validity of race/ethnicity in Medicare databases for studies of racial/ethnic disparities.

Data Sources: The 2010 Medicare Consumer Assessments of Healthcare Providers and Systems (CAHPS®) survey was linked to Medicare enrollment data and local area characteristics from the 2000 Census.

Study Design: Race/ethnicity was cross-tabulated for CAHPS and Medicare data. Within each self-reported category, demographic, geographic, health, and health care variables were compared between those that were and were not similarly identified in Medicare data.

Data Collection Methods: The Medicare CAHPS survey included 343,658 responses from elderly participants (60 percent response rate). Data were weighted for sampling and nonresponse to be representative of the national population of elderly Medicare beneficiaries.

Principal Findings: Self-reported Hispanics, Asians, Pacific Islanders, and American Indians were underidentified in Medicare enrollment data. Individuals in these groups who were identified in Medicare data tended to be more strongly identified with their group, poorer, and in worse health and to report worse health care experiences than those who were not so identified. Read more