Univariate comparison of costs (2012 $CDN) between patients aged 70 years and older who did and did not experience an adverse event after undergoing nonelective abdominal surgery
| Adverse event* | No. (%) | Hospital costs, median (IQR) [range], $CDN | p value |
|---|---|---|---|
| Death | |||
| No | 198 (93) | 7926 (5043–17 880) [1993–104 403] | < 0.001† |
| Yes | 14 (7) | 21 224 (13 815–41 355) [11 079–97 568] | — |
| Clavien–Dindo complication | |||
| None | 102 (48) | 6030 (4010–9570) [1993–37 036] | < 0.001‡ |
| Grade I | 34 (16) | 9459 (6554–16 126) [2975–47 407] | — |
| Grade II | 35 (17) | 17 366 (16 605–23 456) [3513–78 080] | — |
| Grade III | 12 (6) | 16 151 (11 028–19 566) [5973–54 253] | — |
| Grade IV | 29 (14) | 30 660 (16 810–66 427) [9497–104 403] | — |
| Loss of independence | |||
| No | 164 (77) | 7248 (4851–15 611) [1993–97 568] | < 0.001† |
| Yes | 48 (23) | 19 872 (9674–32 452) [3753–104 403] | — |