Observed-to-expected ratios for death or urgent readmission within 30 days for the 162 hospitals included in the study, calculated using 4 different measures*
| Measure | Observed-to- expected ratio, mean ± SD | Observed-to- expected ratio, median (range) |
|---|---|---|
| All admissions, adjusted for patient age and sex | 1.11 ± 0.21 | 1.10 (0.45–1.77) |
| Single admission per patient, adjusted for patient age and sex | 1.14 ± 0.23 | 1.13 (0.44–1.83) |
| All admissions, adjusted for all measurable factors | 0.94 ± 0.11 | 0.93 (0.71–1.39) |
| Single admission per patient, adjusted for all measurable factors | 0.94 ± 0.12 | 0.94 (0.63–1.40) |
Note: SD = standard deviation.
↵* The number of expected events was calculated by use of logistic regression models. Age- and sex-adjusted ratios calculated the expected number of events after adjustment for patient age and sex; completely adjusted ratios used the LACE+ model to determine the expected numbers of events.