Table 2.
Patient clinicopathologic and operative characteristics; comparing out-of-hours procedures to those during business hours.
| Variable | Number (%) | ||
|---|---|---|---|
| Out-of-hours (n=145) | During Business Hours (n=1408) | p-value | |
| Patient characteristics | |||
|
| |||
| Gender (female) | 85 (58.6) | 903 (64.1) | 0.19 |
| Age (median [range]) | 60 [19-89] | 55 [14-90] | 0.012 |
| Previous abdominal surgery | |||
| None | 111 (76.5) | 1064 (75.6) | 0.22 |
| Laparoscopic | 15 (10.3) | 204 (14.5) | |
| Laparotomy | 19 (13.1) | 138 (9.8) | |
|
| |||
| Preoperative details | |||
|
| |||
| Indication for surgery | |||
| Bile stone colics | 23 (15.9) | 1032 (73.3) | <0.001 |
| Acute cholecystitis | 111 (76.6) | 84 (6.0) | |
| Other | 11 (7.6) | 315 (22.4) | |
| Timing of surgery | |||
| Elective | 0 (0) | 1342 (95.3) | <0.001 |
| Emergency | 145 (100) | 67 (4.7) | |
|
| |||
| Perioperative variables | |||
|
| |||
| Usage of antibiotics | |||
| No | 36 (24.8) | 935 (66.4) | <0.001 |
| Yes–prior to operation | 101 (69.7) | 299 (21.2) | |
| Yes–after bile spill | 8 (5.5) | 173 (12.3) | |
| Surgeon | |||
| Surgical resident | 33 (22.8) | 938 (66.6) | <0.001 |
| Surgical staff | 112 (77.2) | 469 (33.3) | |
| Critical View of Safety mentioned | 125 (86.2) | 1330 (94.5) | 0.020 |
| Bile spill | 62 (42.8) | 472 (33.5) | 0.027 |
| Conversion to laparotomy | 14 (9.7) | 28 (2.0) | <0.001 |
| Operative Time (median [range]) | 70 [16-206] | 54 [12-360] | 0.033 |
| Estimated Blood Loss (median [range]) | 30 [0-1000] | 10 [0-1400] | <0.001 |