| Other Hospital Efficiency Index Measures |
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| The analysis also includes the following objective measures for evaluating various hospitals: |
Severity Ratio |
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| The Severity Ratio Index measures the level of complications and comorbidities of admissions in a given hospital – the higher the Index, the more complex the admissions treated by the hospital relative to other hospitals with the same APR-DRG** mix. The Index uses model estimates of the expected LOS for each admission. The Index for each hospital is the ratio of its average expected LOS to the average expected LOS for all hospitals for a given class of admissions with the same case-mix. The severity for each hospital is compared to the average severity of all hospitals after being adjusted to reflect each hospital’s actual case-mix. The ratio for an average hospital is 1.00. A ratio higher than 1.00 implies more complicated cases than average. |
Relative Case-Mix Ratio |
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| The Relative Case-Mix Ratio represents the relative weighted average case-mix using the most efficient practice expected LOS as the weights. The Ratio is relative to all admissions within the given category being shown (admission type or specialty, etc). For example, Rehab hospitals in the Total Admission type have a high Ratio because Rehab admissions tend to have a high benchmark ALOS. However, within the Rehab admission category, these hospitals have a much lower relative case-mix because they are being compared only to the same admission types. Those hospitals with a higher Ratio have a higher expected LOS per admission compared to the average hospital. The ratio for an average hospital is 1.00. A ratio higher than 1.00 implies higher than average LOS mix. |
Case Complexity |
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| The combination of Relative Case-Mix Ratio and Severity Ratio, particularly within admission category, is more indicative of overall case complexity. |
** 3M™ All Patient Refined Diagnostic Related Groups. All copyrights in and to APR-DRGs are owned by 3M. All rights reserved.