Regression result of Emergency Surgery Score (ESS)
| ESS | Number of patients n (n%) | Mortality | Postoperative complication | ||||||
| P value | OR | 95% CI | P value | OR | 95% CI | ||||
| Lower | Upper | Lower | Upper | ||||||
| 0 | 261 (19.7) | – | 1 (Reference) | – | – | – | 1 (Reference) | – | |
| 1 | 234 (17.7) | 0.047 | 2.218 | 1.010 | 4.873 | 0.047 | 2.218 | 1.010 | 4.873 |
| 2 | 266 (20.1) | 0.006 | 2.839 | 1.486 | 5.942 | 0.006 | 2.836 | 1.344 | 5.984 |
| 3 | 157 (11.9) | 0.001 | 3.664 | 1.668 | 8.051 | 0.001 | 3.664 | 1.668 | 8.051 |
| 4 | 138 (10.4) | 0.014 | 13.893 | 1.691 | 114.112 | 0.001 | 3.765 | 1.687 | 8.405 |
| 5 | 90 (6.8) | 0.013 | 15.294 | 1.762 | 132.744 | 0.000 | 6.717 | 2.989 | 15.096 |
| 6 | 71 (5.4) | 0.007 | 19.697 | 2.263 | 171.473 | 0.000 | 6.165 | 2.606 | 14.583 |
| 7 | 52 (3.9) | 0.000 | 47.273 | 5.770 | 387.299 | 0.000 | 15.688 | 6.748 | 36.467 |
| 8 | 25 (1.9) | 0.000 | 65.000 | 7.241 | 583.510 | 0.000 | 14.119 | 5.027 | 39.653 |
| 9 | 10 (0.8) | 0.000 | 111.429 | 10.267 | 1209.319 | 0.000 | 58.567 | 13.161 | 260.618 |
| 10 | 10 (0.8) | 0.000 | 260.000 | 25.494 | 2651.619 | 0.000 | 58.567 | 13.161 | 260.618 |
| >11 | 8 (0.6) | 0.000 | 260.000 | 23.504 | 2876.165 | 0.000 | 200.800 | 22.863 | 1763.608 |
| z-score | – | 0.000 | 1.652 | 1.484 | 1.84 | 0.000 | 1.415 | 1.327 | 1.509 |