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3. Data Sources for Counting the Uninsured Current Population Survey (CPS)
Survey of Income and Program Participation (SIPP)
Medical Expenditure Panel Survey (MEPS)
National Health Interview Survey (NHIS)
4. Advantages of Using the CPS
Largest sample size
Allows analysis of sub-populations
Allows analysis of all 50 states
Data released within months of
completed interviews
Allows for trend analysis over time
5. Problems with the CPS Estimates Likely over-count of those uninsured throughout the previous full calendar year
Likely under-count of those covered by Medicaid at some point in the previous calendar year
6. Estimates of the Number of Uninsured, 2002(in Millions)
7. Access and Utilization of Care by Duration of Health Coverage, 1998-99
8. Medicaid Estimates, 2000,“Ever Covered/Enrolled”
9. Examples of Types of Recall Error Short periods of Medicaid coverage forgotten
Unaware of continued coverage for all household members (e.g., automatic continuous eligibility)
Medicaid-HMO cards
10. Sources of Potential Error in Medicaid Program Enrollment Data Change in Medicaid eligibility
examples: family income, move to new state
Duplication on Medicaid enrollment lists
examples: children identified as living in both of separated parents’ households
11. CPS Adjustments for Medicaid Enrollment Census adjusts Medicaid estimate based on:
Eligibility for public assistance
Imputations for missing responses
Adjustment has grown less valid as Medicaid and cash assistance were delinked
12. Adjusted CPS Full-Year Uninsured Estimates
13. Experimental Studies:Percent of Medicaid/SCHIP Enrollees Who Report Being Uninsured
14. Reasons why the CPS remains the most widely-used uninsured estimate Largest sample size of 4 national surveys
Allows for key subpopulations to be studied
Allows for annual state estimates
Data released soon after survey completed
Provides trends in health insurance coverage over several years