Table 5.
Postoperative outcomes by preoperative risk stratum and Surgical Apgar Score
| Preoperative risk predictors | Surgical Apgar Score | p Value* | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0–4 | 5–6 | 7–8 | 9–10 | ||||||||
| Quintile | Mean risk (%) | Range (%) | Number of patients | % major complication | Number of patients | % major complication | Number of patients | % major complication | Number of patients | % major complication | |
| 1 | 3.2 | 2.1–3.6 | 14 | 7.1 | 115 | 11.3 | 367 | 3.3 | 185 | 1.6 | 0.0001 |
| 2 | 3.8 | 3.6–3.9 | 6 | 16.7 | 84 | 3.6 | 345 | 2.3 | 188 | 5.3 | 0.29 |
| 3 | 4.1 | 3.9–4.3 | 2 | 50 | 79 | 2.5 | 353 | 3.4 | 176 | 1.1 | 0.039 |
| 4 | 4.6 | 4.4–5.2 | 4 | 25 | 74 | 5.4 | 361 | 3.9 | 227 | 1.3 | 0.005 |
| 5 | 11.0 | 5.3–59.8 | 13 | 38.5 | 83 | 15.7 | 358 | 15.1 | 202 | 8.9 | 0.002 |
* Cochrane-Armitage chi square trend test.