Case Studies in Measuring Quality

Business & Finance
Tutor: None Selected Time limit: 1 Day

Chapter One of Dlugacz (2006) provides foundational discussion to what quality measures actually measure. Chapter two provides several case studies demonstrating the value of quantifying and measuring quality. Pick one of the following:

Case Example: Cardiac Mortality (p. 24). Case Example: Intensive Care Unit (p. 26). Case Example: Falls (p. 30).

Provide a 250- to 300-word analysis of your chosen case. Discuss what precipitated data collection for your case, what data was collected, and how that data applied to change or improve business practices. Is there anything different from what you would do in the face of a similar case?

Jul 17th, 2015

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Background

Except in cardiac surgery, measuring quality with procedure-specific mortality rates is unreliable due to small sample sizes at individual hospitals. Statistical power can be improved by combining mortality data from multiple operations. We sought to determine whether this approach would still be useful in understanding performance with individual procedures.

Methods

We studied eleven high-risk operations performed in the national Medicare population (1996–1999). For each operation, we calculated 1) the risk-adjusted mortality rate for the procedure and 2) the mortality rate with up to ten other operations combined (“other” mortality). To test for an association between these mortality rates, we calculated the correlation coefficient adjusting for random variation. We then collapsed hospitals into quintiles of other mortality and calculated procedure-specific mortality rates within each of these quintiles.

Results

Mortality with specific operations was modestly correlated with other mortality: coefficients ranged from 0.14 for pneumonectomy to 0.35 for esophagectomy. Despite small to moderate correlations, other mortality was a good predictor of procedure-specific mortality for 10 of the 11 operations. Pancreatic resection had the strongest relationship, with procedure-specific mortality rates at hospitals in the worst quintile of other mortality 3-fold higher than those in the best quintile (15.2% vs. 6.3%, p<.001). Pneumonectomy had the weakest relationship, with no significant relationship between other mortality and procedure-specific mortality.

Conclusions

Hospitals with low mortality rates for one operation tend to have lower mortality rates for other operations. These relationships suggest that different operations share important structures and processes of care related to performance. Future efforts aimed at predicting procedure-specific performance should consider incorporating data from other operations at that hospital.


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Jul 17th, 2015

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