Table 2.
Descriptive data for different studies on the SORT
| Present study (n = 17 965) | Original SORT9 (n = 16 788) | NZ study12 (n = 360 140) | |
|---|---|---|---|
| Age at surgery (years), mean | 55.5 | 55.8 | 49.1 |
| Sex ratio (M : F) | 7763 : 10 202 | 7481 : 9307 | 166 024 : 194 116 |
| Surgical urgency | |||
| ȃElective | 13 754 (76.6) | 10 987 (65.4) | 278 748 (77.4) |
| ȃExpedited | – | 2136 (12.7) | – |
| ȃUrgent | 4211 (23.4) | 3424 (20.4) | 81 392 (22.6) |
| ȃImmediate | – | 241 (1.4) | – |
| Severity | |||
| ȃMinor | 1399 (7.8) | 1423 (8.5) | 38 895 (10.8) |
| ȃIntermediate | 4850 (27.0) | 4134 (24.6) | 295 675 (82.1) |
| ȃMajor | 5647 (31.4) | 5488 (32.7) | 18 007 (5.0) |
| ȃXmajor–complex | 6069 (33.8) | 5743 (34.2) | 7563 (2.1) |
| ȃMalignancy | 4746 (26.4) | 1649 (9.8) | 23 409 (6.5) |
| ASA grade | |||
| ȃI | 5218 (29.0) | 5416 (32.3) | 228 497 (63.4) |
| ȃII | 7622 (42.4) | 7585 (45.2) | 117 738 (32.7) |
| ȃIII | 4486 (25.0) | 3339 (19.9) | 11 586 (3.2) |
| ȃIV | 609 (3.4) | 417 (2.5) | 1787 (0.5) |
| ȃV | 30 (0.2) | 31 (0.2) | 532 (0.1) |
| Surgical specialty | |||
| ȃVascular | 343 (1.9) | 732 (4.4) | 9 220 (2.6) |
| ȃOrthopaedic | 4126 (23.0) | 5903 (35.2) | 108 820 (30.2) |
| ȃNeurosurgery | 1140 (6.3) | – | 13 403 (3.7) |
| ȃObstetrics | 870 (4.8) | – | n.a. |
| ȃUrogenital | 2914 (16.2) | 3462 (20.6) | 13 962 (3.9) |
| ȃGastrointestinal | 2941 (16.4) | 2666 (15.9) | 61 478 (17.1) |
| ȃBreast | 660 (3.7) | 835 (5.0) | n.a. |
| ȃThoracic | 64 (1.5) | 191 (1.1) | 4113 (1.1) |
| ȃOtorhinolaryngological | 1291 (7.2) | 1257 (7.5) | n.a. |
| ȃOther | 2800 (15.6) | 1742 (10.4) | 149 144 (41.4) |
| ȃNot classifiable | 266 (1.5) | – | – |
| 30-day mortality (%) | 1.6 | 1.4 | 0.7 |
Values are n (%) unless otherwise indicated. SORT, Surgical Outcome Risk Tool; NZ, New Zealand; n.a., not available as these data in the manuscript were grouped as “Other”.