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Updated: Aug 15, 2026

Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Insights
The Department of Health and Human Services (HHS) identified 269 hospitals with unusual mortality rates in 1986. Data also revealed variations in death and discharge rates for specific medical procedures.
Area of Science:
- Health Services Research
- Public Health
- Hospital Quality Measurement
Background:
- The Department of Health and Human Services (HHS) is responsible for protecting the health of all Americans.
- Monitoring hospital performance is crucial for ensuring quality healthcare delivery.
- Variations in patient outcomes across hospitals can indicate differences in care quality.
Purpose of the Study:
- To report on the initial findings of abnormal hospital mortality rates identified by the HHS.
- To present data on variations in mortality and discharge rates for specific Diagnosis-Related Groups (DRGs).
- To highlight the release of comprehensive hospital performance data by the HHS.
Main Methods:
- Analysis of hospital mortality data collected by the Department of Health and Human Services (HHS).
- Identification of hospitals with statistically significant higher or lower than average overall mortality rates.
- Examination of mortality and discharge rate data for nine specific Diagnosis-Related Groups (DRGs).
Main Results:
- A list of 269 hospitals across 46 states was released, with 142 exhibiting higher than average mortality rates and 127 showing lower than average rates.
- Mortality data was also analyzed for nine specific DRGs, including coronary bypass surgery and acute myocardial infarction.
- Unusual discharge rate data was released for general hospital populations and for the specified nine DRGs.
Conclusions:
- The initial release of hospital mortality data by the HHS highlighted significant variations in patient outcomes.
- The findings underscore the importance of ongoing monitoring and reporting of hospital performance metrics.
- This data release served as a foundational step in assessing and improving healthcare quality across U.S. hospitals.
Abstract:
On March 12, 1986, the Department of Health and Human Services (HHS) released a list of 269 hospitals in 46 states with abnormal overall mortality rates. Of these hospitals, 142 showed higher than average death rates and 127 showed lower than average death rates. Also released were similar data for nine DRGs: coronary bypass surgery, pacemaker implantation, congestive heart failure, acute myocardial infarction, pneumonia, GI hemorrhage, transurethral prostatectomy, cholecystectomy, and joint procedures. Finally, HHS released data for unusual discharge rates in general and for unusual discharge rates for these nine DRGs.
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