Table 3.
Outcomes for propensity score-matched participants
| Event | Operative management (n = 1222) | Non-operative management (n = 1222) | Odds ratio or incident rate ratio † |
|---|---|---|---|
| Unsuccessful non-operative management | N/A | 249 of 1222 (20) | |
| Length of hospital stay (days) * | 3 (2–4) | 2.5 (1–4) | 0.89 (0.83, 0.95) |
| Intra-abdominal collection | 68 of 1212 (6) | 34 of 1216 (3) | 0.48 (0.32, 0.74) |
| Managed with antibiotics | 68 of 1212 (6) | 31 of 1217 (3) | 0.43 (0.28, 0.67) |
| Managed with interventional radiology drain | 6 of 1222 (0.5) | 5 of 1221 (0.4) | 0.83 (0.25, 2.73) |
| Postoperative ileus | 72 of 1212 (6) | 22 of 1217 (2) | 0.28 (0.17, 0.46) |
| Wound infection | 52 of 1212 (4) | 12 of 1216 (1) | 0.22 (0.12, 0.42) |
| Managed with antibiotics | 46 of 1212 (4) | 11 of 1216 (1) | 0.24 (0.12, 0.46) |
| Requiring incision and drainage | 15 of 1212 (1) | 5 of 1216 (0.4) | 0.33 (0.12, 0.92) |
| HAP | 25 of 1212 (2) | 4 of 1217 (0.3) | 0.16 (0.05, 0.45) |
| Managed with oral antibiotics | 5 of 1212 (0.4) | 1 of 1217 (0.1) | 0.20 (0.02, 1.71) |
| Managed with intravenous antibiotics | 22 of 1212 (2) | 3 of 1217 (0.3) | 0.14 (0.04, 0.46) |
| MI | 1 of 1212 (0.1) | 2 of 1216 (0.2) | 2.00 (0.18, 22.1) |
| DVT/PE | 5 of 1212 (0.4) | 1 of 1217 (0.1) | 0.20 (0.02, 1.71) |
| COVID-19 | 9 of 1212 (0.7) | 10 of 1217 (0.8) | 1.11 (0.45, 2.73) |
| Death (30 days) | 4 of 1212 (0.3) | 2 of 1217 (0.2) | 0.50 (0.09, 2.73) |
| Unplanned level 2/3 care | 13 of 1212 (1) | 8 of 1217 (0.7) | 0.62 (0.26, 1.48) |
| Unplanned re-attendances within 90 days | 163 of 1171 (14) | 216 of 1170 (18) | 1.39 (1.11, 1.75) |
| Any complications (collection, COVID-19, wound infections, HAP, MI, DVT/PE and death) | 141 of 1212 (12) | 55 of 1215 (5) | 0.36 (0.26, 0.50) |
Values in parentheses are percentages unless indicated otherwise; bold text denotes values of statistical significance.
*values are median (i.q.r.).
†
Values in parentheses are 95 per cent confidence intervals. HAP, hospital-acquired pneumonia; MI, myocardial infarction; DVT/PE, deep vein thrombosis/pulmonary embolism.