Variable	HP group (n = 304)	RPA group (n = 168)	P value
Age—mean ± SD	69.1 ± 14.7	60.0 ± 13.2	< 0.001
Female sex—N. (%)	156 (51.3%)	77 (45.8%)	0.255
ASA—N. (%)			< 0.001
1	29 (9.5%)	25(14.1%)
2	77 (25.4%)	78 (46.4%)
3	140 (46.2%)	61 (36.3%)
4	50 (16.5%)	4 (2.3%)
5	7 (2.3%)	0 (0.0%)
qSOFA score ≥ 2- N. (%)	39 (12.8%)	8 (4.7%)	0.005
Clinical presentation
Large bowel perforation	280 (92.7%)	146 (88.4%)	0.123
Large bowel obstruction	29 (9.6%)	24 (14.3%)	0.125
Colonic Ischemia	14 (4.6%)	1 (0.5%)	0.017
Abdominal approach
Laparoscopy	42 (13.8%)	78 (46.4%)	< 0.001
Laparotomy	260 (85.8%)	87 (51.7%)
Time from hospital admission to surgery			0.013
Within 12 h	187 (61.5%)	67 (39.8%)
After 12 h	117 (38.4%)	101 (60.1%)
Time of surgery
Weekend	83 (27.3%)	20 (11.9%)	< 0.001
Early night: 8 pm–11 pm	70 (23.0%)	28 (16.7%)	< 0.001
Late night: 11 pm–7am	81 (26.6%)	17 (10.1%)
Surgeon’s experience
> 50 colorectal resections	211 (69.4%)	134 (79.7%)	0.015
Center annual volume of emergency surgical procedures
> 1000	86 (28.7%)	51 (30.5%)	0.864
Center annual volume of elective colorectal resections
> 100	154 (51.5%)	101 (60.4%)	0.275
Postoperative outcomes
LOS—mean ± SD	14.0 ± 11.6	12.3 ± 9.2	0.108
Complications	155 (52.3%)	66 (40.0%)	0.011
Clavien-Dindo ≥ 3b	66 (21.7%)	25 (14.8%)	0.007
30-day mortality	34 (11.9%)	3 (1.9%)	< 0.001
1-year follow-up
Permanent stoma	131 (51.9%)	6 (14.2%)	< 0.001
Surgery for ostomy reversal	69 (29.3%)	30 (71.4%)	< 0.001
Complication during reversal surgery	12 (17.3%)	2 (6.6%)	0.027