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Using the Bayesian Improved Surname Geocoding Method ( BISG ) to Create a Working Classification of Race and Ethnicity in a Diverse Managed Care Population: A Validation Study
Author(s) -
AdjayeGbewonyo Dzifa,
Bednarczyk Robert A.,
Davis Robert L.,
Omer Saad B.
Publication year - 2014
Publication title -
health services research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.706
H-Index - 121
eISSN - 1475-6773
pISSN - 0017-9124
DOI - 10.1111/1475-6773.12089
Subject(s) - ethnic group , geocoding , pacific islanders , demography , receiver operating characteristic , medicine , race (biology) , population , gerontology , statistics , geography , mathematics , cartography , sociology , gender studies , anthropology
Objective To validate classification of race/ethnicity based on the Bayesian Improved Surname Geocoding method ( BISG ) and assess variations in validity by gender and age. Data Sources/Study Setting Secondary data on members of K aiser P ermanente G eorgia, an integrated managed care organization, through 2010. Study Design For 191,494 members with self‐reported race/ethnicity, probabilities for belonging to each of six race/ethnicity categories predicted from the BISG algorithm were used to assign individuals to a race/ethnicity category over a range of cutoffs greater than a probability of 0.50. Overall as well as gender‐ and age‐stratified sensitivity, specificity, positive predictive value ( PPV ), and negative predictive value ( NPV ) were calculated. Receiver operating characteristic ( ROC ) curves were generated and used to identify optimal cutoffs for race/ethnicity assignment. Principal Findings The overall cutoffs for assignment that optimized sensitivity and specificity ranged from 0.50 to 0.57 for the four main racial/ethnic categories (White, Black, Asian/Pacific Islander, Hispanic). Corresponding sensitivity, specificity, PPV , and NPV ranged from 64.4 to 81.4 percent, 80.8 to 99.7 percent, 75.0 to 91.6 percent, and 79.4 to 98.0 percent, respectively. Accuracy of assignment was better among males and individuals of 65 years or older. Conclusions BISG may be useful for classifying race/ethnicity of health plan members when needed for health care studies.