Table 2Rate of medical injury in patients discharged from Wisconsin general, acute care hospitals, by category, 2001

CategoryCasesRate/1000 dischargesMean excess LOS (days)*Percent increased LOS*Cumulative excess LOS**
Drug 31,38256.20.478.614,611
Device, implant, or graft 16,26729.10.8716.014,093
Procedure 33,22559.51.1020.536,710
Radiation 1,4692.60.6912.71,015
Any injury 74,447133.30.7714.557,619
*

Mean excess length of stay (LOS) and percent increased LOS compared to discharges without the specified medical injury after adjusting for APR-DRG (All Patient Refined - Diagnosis Related Groups), risk of mortality and severity of illness (see Methods section).

**

Cumulative excess LOS is the product of cases and mean excess LOS. Note: The number of injured patients in each category sum to more than the total number of injured patients because patients can have a medical injury in more than one category.

From: Medical Injury Identification Using Hospital Discharge Data

Cover of Advances in Patient Safety: From Research to Implementation (Volume 2: Concepts and Methodology)
Advances in Patient Safety: From Research to Implementation (Volume 2: Concepts and Methodology).
Henriksen K, Battles JB, Marks ES, et al., editors.

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