Table 2.
Complications and adverse events by weekday
| Monday | Tuesday | Wednesday | Thursday | Friday | Unadjusted p value | ||
|---|---|---|---|---|---|---|---|
| Total number of procedures | 15,100 | 14,055 | 12,033 | 7148 | 1013 | ||
| Severe complications* | N (%) | 417 (2.8) | 368 (2.6) | 394 (3.3) | 217 (3.0) | 32 (3.2) | 0.02 |
| Unadjusted (OR) | Ref | 0.95 (0.82–1.09) | 1.19 (1.04–1.37) | 1.10 (0.93–1.30) | 1.15 (0.80–1.66) | ||
| Adjusted (OR) | Ref | 0.95 (0.81–1.11) | 1.10 (0.94–1.28) | 1.00 (0.83–1.19) | 0.92 (0.62–1.36) | ||
| Overall complications | N (%) | 1085 (7.2) | 942 (6.7) | 922 (7.7) | 551 (7.7) | 74 (7.3) | 0.02 |
| Unadjusted (OR) | Ref | 0.93 (0.85–1.02) | 1.07 (0.98–1.17) | 1.08 (0.97–1.20) | 1.02 (0.80–1.30) | ||
| Adjusted (OR) | Ref | 0.91 (0.83–1.01) | 1.09 (0.98–1.20) | 0.97 (0.86–1.08) | 0.91 (0.70–1.18) | ||
| Readmission | N (%) | 1102 (7.3) | 1047 (7.4) | 923 (7.7) | 568 (7.9) | 86 (8.5) | 0.32 |
| Unadjusted (OR) | Ref | 1.02 (0.94–1.12) | 1.06 (0.96–1.15) | 1.10 (0.99–1.22) | 1.18 (0.94–1.48) | ||
| Adjusted (OR) | Ref | 0.86 (0.78–0.95) | 0.95 (0.86–1.05) | 0.96 (0.85–1.08) | 0.99 (0.77–1.27) | ||
| Specific complications (N, %) | Leak | 127 (0.8) | 113 (0.8) | 115 (1.0) | 71 (1.0) | 10 (1.0) | 0.53 |
| Abscess | 102 (0.7) | 77 (0.5) | 88 (0.7) | 57 (0.8) | 5 (0.5) | 0.19 | |
| Bleeding | 257 (1.7) | 219 (1.6) | 222 (1.8) | 128 (1.8) | 14 (1.4) | 0.38 | |
| Bowel obstruction | 145 (1.0) | 127 (0.9) | 150 (1.2) | 56 (0.8) | 9 (0.9) | 0.01 | |
| Cardiovascular event | 21 (0.1) | 22 (0.2) | 9 (0.1) | 10 (0.1) | 4 (0.4) | 0.06 | |
| DVT/PE | 14 (0.1) | 11 (0.1) | 9 (0.1) | 8 (0.1) | 0 (0) | 0.77 | |
| Pulmonary complication | 63 (0.4) | 80 (0.6) | 67 (0.6) | 44 (0.6) | 5 (0.5) | 0.26 | |
DVT/PE deep vein thrombosis/pulmonary embolism
*Defined by complications graded as Clavien-Dindo IIIb or worse, i.e., a complication requiring intervention under general anesthesia, treatment at an intensive care unit, or death