TABLE 2.
Perioperative characteristics
| Variable | SSI No (%) | SSI Yes (%) | P value | |||
|---|---|---|---|---|---|---|
| Emergency procedure | No | 296 | (76.1%) | 93 | (23.9%) | .093 |
| Yes | 27 | (64.3%) | 15 | (35.7%) | ||
| Contamination class | Clean‐cont. | 284 | (76.1%) | 21.5 | (23.9%) | .194 |
| Contaminated | 30 | (66.7%) | 29.5 | (33.3%) | ||
| Dirty‐Infected | 9 | (69.2%) | 16.7 | (30.8%) | ||
| Incision | Median | 168 | (78.5%) | 46 | (21.5%) | .117 |
| Transversal | 39 | (79.6%) | 10 | (20.4%) | ||
| L‐formed | 103 | (70.5%) | 43 | (29.5%) | ||
| Subcostal | 12 | (57.1%) | 9 | (42.9%) | ||
| Packing | No | 300 | (77.7%) | 86 | (22.3%) | .000 |
| Yes | 23 | (51.1%) | 22 | (48.9%) | ||
| Preoperative biliary drainage | No | 283 | (75.9%) | 90 | (24.1%) | .55 |
| PTCD | 19 | (67.9%) | 9 | (32.1%) | ||
| ERCP | 6 | (60%) | 4 | (40%) | ||
| ERCP + Stent | 15 | (75%) | 5 | (25%) | ||
| Duration of operation (min) | Mean | 241 | 266 | .113 | ||
| SD | 108 | 128 | ||||