TABLE 3.
Final risk scoring system
| Endpoint/performance | Feature | Range | Points |
|---|---|---|---|
|
1‐week mortality Log loss: 0.0330 AUROC: 84.58% Brier score: 0.00625 AUPR: 9.31% |
Brain surgery | No | −4 |
| Yes | +13 | ||
| Amount of intraoperative RBC transfusion (pack) | <2 | −9 | |
| 2–4 | −1 | ||
| 4–10 | +1 | ||
| ≥10 | +14 | ||
| Preoperative platelet count (cell/nL) | <120 | +13 | |
| 120–200 | 0 | ||
| 200–220 | −16 | ||
| ≥ 220 | −3 | ||
| Preoperative albumin (g/dL) | < 3.1 | +11 | |
| 3.1–3.7 | 0 | ||
| 3.7–4.6 | −4 | ||
| ≥ 4.6 | −11 | ||
| ASA physical status | 1–2 | −5 | |
| 3–4 | +5 | ||
|
1‐month mortality Log‐loss: 0.0640 AUROC: 90.66% Brier score: 0.0155 AUPR: 25.91% |
POD 5 NMLPR (×10−8 nL2/cell) | <100 | −22 |
| 100–300 | −8 | ||
| 300–1000 | +4 | ||
| ≥1000 | +19 | ||
| Preoperative albumin (g/dL) | < 3.1 | +8 | |
| 3.1–3.8 | +2 | ||
| 3.8–4.1 | 0 | ||
| ≥4.1 | −7 | ||
| POD 5 albumin (g/dL) | <2.7 | +6 | |
| 2.7–3.0 | +1 | ||
| 3.0–3.3 | −2 | ||
| ≥3.3 | −5 | ||
| AKI | No | −2 | |
| Yes | +8 |
Abbreviations: AKI, acute kidney injury; ASA, American Society of Anesthesiologists; AUROC, area under the receiver operating characteristic curve; AUPR, area under precision‐recall curve; NMLPR, (neutrophil count × mean platelet volume) to (lymphocyte count × platelet count) ratio; POD, postoperative day; RBC, red blood cell.