Brier Score of the three clinical models and the three administrative models, for all cardiac surgery and for only isolated coronary artery bypass surgery
| All cardiac surgery | Isolated CABG surgery | |||||
|---|---|---|---|---|---|---|
| Brier scores | Administrative | Clinical | p Value difference | Administrative | Clinical | p Value difference |
| Original models | 2.9% (2.8–3.0) | 3.0% (2.8–3.2) | 0.093 | 1.3% (1.2–1.5) | 1.4% (1.1–1.7) | 0.030 |
| Updated models | 2.9% (2.7–3.1) | 2.7% (2.5–2.9) | <0.001 | 1.3% (1.1–1.4) | 1.2% (1.0–1.3) | <0.001 |
| Updated+interaction terms | 2.8% (2.6–3.0) | 2.6% (2.5–2.8) | <0.001 | 1.2% (1.1–1.4) | 1.2% (1.0–1.3) | 0.026 |
Brier scores range from 0 to a value depending on the prevalence of the outcome. The maximum Brier score that was possible in this data was 3.0% for all cardiac surgery and 1.3% for isolated CABG. A lower Brier score indicates better calibration. Brackets denote 95% CIs.
CABG: coronary artery bypass grafting.