Lisa I. Iezzoni

Risk Adjustment for Measuring Healthcare Outcomes

Predicting Who Dies Depends on How Severity Is Measured: Implications for Evaluating Patient Outcomes

Some pairs of severity measures assigned very different severity levels to more than 20% of patients. Evaluations of patient outcomes need to be sensitive to the severity measur...

The Importance of Comorbidities in Explaining Differences in Patient Costs

Comorbidities, particularly when determined from the medical record, are important determinants of patient costs.

Severity Measurement Methods and Judging Hospital Death Rates for Pneumonia

Payers and policymakers are increasingly examining hospital mortality rates as indicators of hospital quality. To be meaningful, these death rates must be adjusted for patient s...

How severity measures rate hospitalized patients

Comorbidities, complications, and coding bias. Does the number of diagnosis codes matter in predicting in-hospital mortality?

Bias against coding of chronic or comorbid conditions on the computerized discharge abstracts of patients who die best explains these results. Efforts to improve diagnosis codin...