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Average clinical values and standard deviations (SD).
| Variable | Total cohort | Cost cohort |
|---|---|---|
| Mean age ± SD | 61.0 ± 11.7 | 61.4 ± 11.7 |
| Mean body mass index ± SD | 33.3 ± 8.1 | 33.2 ± 8.0 |
| Mean length of stay ± SD | 3.6 ± 1.5 | 3.6 ± 1.5 |
| Illness severity level ± SD | 1.2 ± 0.5 | 1.1 ± 0.5 |
| Risk of mortality level ± SD | 1.1 ± 0.4 | 1.1 ± 0.5 |
