Related Experiment Video
Updated: Aug 10, 2026

Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Going bare: trends in health insurance coverage, 1989 through 1996
O Carrasquillo1, D U Himmelstein, S Woolhandler
1Department of Medicine, Cambridge Hospital/Harvard Medical School, Cambridge, Mass., USA. carraso@medicine1.cpmc.columbia.edu
Health insurance coverage in the US declined from 1989 to 1996, increasing the uninsured population by 8.3 million. Young adults, children, and minority groups were disproportionately affected by rising rates of uninsurance.
Area of Science:
- Public Health
- Health Economics
- Sociology
Background:
- Health insurance coverage is a critical determinant of healthcare access and utilization.
- Understanding trends in insurance coverage is essential for public health policy and resource allocation.
Purpose of the Study:
- To analyze trends in health insurance coverage in the United States between 1989 and 1996.
- To identify demographic and socioeconomic groups most affected by changes in insurance status.
Main Methods:
- Analysis of annual cross-sectional survey data from the US Census Bureau.
- Examination of changes in the number and proportion of insured and uninsured individuals over time.
- Stratification of results by age, race/ethnicity, income level, and geographic region.
Main Results:
- The number of uninsured individuals in the US increased by 8.3 million between 1989 and 1996.
- Private insurance rates declined while Medicaid coverage increased from 1989 to 1993, with stabilization thereafter.
- Young adults (18-39), children, Black individuals, and Hispanic individuals experienced significant increases in uninsurance rates. The increase shifted from poor to middle-income families over time.
Conclusions:
- Despite economic growth, the uninsured population in the US continued to grow between 1989 and 1996.
- Children, young adults, poor and middle-income families, Black individuals, and Hispanic individuals were the most impacted populations.
- These findings highlight persistent disparities in health insurance coverage and underscore the need for targeted interventions.
Related Concept Videos
Introduction To Health Care Delivery System
The Institute of Medicine (IOM) advocates for a patient-centered, effective, safe, timely, equitable, and effective healthcare system. The National Priorities...
Methods Of Healthcare Delivery System
Managed Care System:
The managed care system is designed to control the cost while maintaining the quality of care. The patient's care from admission to discharge is planned by the primary care provider or the case manager, also known as the gatekeeper. In a managed care system, the number of care providers is limited...
Issues And Trends In Healthcare Delivery System
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
Purpose of Health Records II
Standards of Care I
Standards of Care II
