American Indian/Alaska Native uninsurance disparities: a comparison of 3 surveys.
OBJECTIVE
We examined whether 3 nationally representative data sources produce consistent estimates of disparities and rates of uninsurance among the American Indian/Alaska Native (AIAN) population and to demonstrate how choice of data source impacts study conclusions.


METHODS
We estimated all-year and point-in-time uninsurance rates for AIANs and non-Hispanic Whites younger than 65 years using 3 surveys: Current Population Survey (CPS), National Health Interview Survey (NHIS), and Medical Expenditure Panel Survey (MEPS).


RESULTS
Sociodemographic differences across surveys suggest that national samples produce differing estimates of the AIAN population. AIAN all-year uninsurance rates varied across surveys (3%-23% for children and 18%-35% for adults). Measures of disparity also differed by survey. For all-year uninsurance, the unadjusted rate for AIAN children was 2.9 times higher than the rate for White children with the CPS, but there were no significant disparities with the NHIS or MEPS. Compared with White adults, AIAN adults had unadjusted rate ratios of 2.5 with the CPS and 2.2 with the NHIS or MEPS.


CONCLUSIONS
Different data sources produce substantially different estimates for the same population. Consequently, conclusions about health care disparities may be influenced by the data source used.
Johnson
Pamela Jo
PJ
State Health Access Data Assistance Center, Division of Health Policy and Management, School of Public Health, University of Minnesota, Minneapolis, USA. johns245@umn.edu
Blewett
Lynn A
LA
Call
Kathleen Thiede
KT
Davern
Michael
M
D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006306:Health Surveys; D054625:Healthcare Disparities / Q000706:statistics & numerical data; D006801:Humans; D015994:Incidence; D007198:Indians, North American / Q000706:statistics & numerical data*; D007223:Infant; D004930:Inuit / Q000706:statistics & numerical data*; D008297:Male; D017057:Medically Uninsured / Q000706:statistics & numerical data*; D008875:Middle Aged; D014481:United States / Q000453:epidemiology; D055815:Young Adult