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Combining health plan performance indicators into simpler composite measures.

Alan M Zaslavsky, James A Shaul, Lawrence B Zaborski

Health Care Financing Review

|December 26, 2002

Summary

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Researchers developed four summary scores combining Consumer Assessment of Health Plan Study (CAHPS) and Health Plan Employer Data Information System (HEDIS) measures for Medicare managed care (MMC) plans. These scores simplify performance evaluation, covering care, access, vaccinations, and clinical quality.

Area of Science:

Health Services Research
Quality Improvement
Healthcare Performance Measurement

Background:

Medicare managed care (MMC) plans utilize multiple performance measures, including the Consumer Assessment of Health Plan Study (CAHPS) survey and Health Plan Employer Data Information System (HEDIS).
Existing measures can be numerous, potentially complicating comprehensive performance assessment and comparison.
There is a need to streamline performance reporting for better interpretability and actionable insights.

Purpose of the Study:

To investigate the combination of CAHPS and HEDIS measures into a reduced set of summary performance scores for MMC plans.
To identify a parsimonious set of scores that capture the majority of performance variability.

Main Methods:

Factor analysis or similar statistical techniques were likely employed to identify underlying dimensions within the CAHPS and HEDIS datasets.

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The analysis focused on measures relevant to Medicare managed care plans.

The study aimed to create summary scores that are substantively interpretable and internally consistent.

Main Results:

Four summary performance scores were identified that effectively capture most of the variability in the original CAHPS and HEDIS measures.
These four scores represent key domains: care at the doctor's office, customer service and access, vaccinations, and clinical quality measures.
The derived summary scores demonstrated substantive interpretability and internal consistency.

Conclusions:

A simplified framework of four summary scores can adequately represent the performance of Medicare managed care plans based on CAHPS and HEDIS data.
These summary scores offer a more manageable and interpretable way to assess and compare plan performance.
The findings support the use of these composite scores for quality improvement initiatives and reporting.