Key result
Using a computer-based severity measure, standardized mortality ratios across 34 Veterans Affairs intensive care units varied substantially from 0.62 to 1.27.
Cohort (n=29,377)
Yes
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Substantial SMR variation across VA ICUs signals potential quality differences; leaves open contributions of unmeasured case-mix or processes.
Render et al. (2005) conducted a cohort in Intensive care unit admissions (n=29,377). Computer-based severity of illness measure was evaluated on Standardized mortality ratio (observed/expected deaths) and observed minus expected length of stay (OMELOS). Using a computer-based severity measure, standardized mortality ratios across 34 Veterans Affairs intensive care units varied substantially from 0.62 to 1.27.
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