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Performance of the Predictive Model in the Two Cohorts
| Risk Group | Prediction Rule Points | Delirium Rate | Risk Ratio (95% CI) |
C-Statistic |
|---|---|---|---|---|
|
Derivation Cohort (n=122) |
0.74 | |||
| 0 | 5/25 (19%) | Referent | ||
| 1 | 20/44 (47%) | 2.4 (1.9, 3.0) | ||
| 2 | 23/36 (63%) | 3.2 (2.6, 4.0) | ||
| ≥3 | 15/18 (86%) | 4.4 (3.5, 5.6) | ||
|
Validation Cohort (n=109) |
0.75 | |||
| 0 | 5/29 (18%) | Referent | ||
| 1 | 21/48 (43%) | 2.4 (2.0, 3.0) | ||
| 2 | 13/22 (60%) | 3.4 (2.7, 4.2) | ||
| ≥3 | 9/10 (87%) | 4.9 (3.8, 6.2) |
