Risk factors for postoperative stoma outlet obstruction in ulcerative colitis

Table 5 Operative details and outcomes and computed tomography measurements in relation to stoma sidedness with ileal pouch-anal anastomosis

	Overall (n = 90)	Right side (n = 31)	Left side (n = 59)	P value
Surgical approach
Laparoscopy	89 (98.9%)	30 (96.8%)	59 (100%)	0.344
Open	1 (1.1%)	1 (3.2%)	0
Operative time1 (min), (range)	346 (222-631)	347 (227-487)	339 (222-631)	0.393
Intraoperative bleeding1 (mL), (range)	61.5 (5-741)	52 (5-337)	63 (5-741)	0.959
Maximum stoma drainage volume1 (mL), (range)	2000 (150-5230)	1900 (150-4600)	2000 (400-5230)	0.577
Days from surgery to maximum stoma drainage volume1 (d), (range)	6 (1-21)	6 (1-21)	6 (1-14)	0.051
Rectus abdominal muscle thickness at umbilical level1 (mm), (range)	9.8 (5.7-15.7)	10.65 (6.3-13.6)	9.5 (5.7-15.7)	0.228
Subcutaneous fat thickness at umbilical level1 (mm), (range)	15.7 (2.9-52.3)	16.9 (7.2-42.5)	13.8 (2.9-52.3)	0.058
Stoma outlet obstruction
Yes	22 (24.4%)	8 (25.8%)	14 (23.7%)	0.827
None	68 (75.6%)	23 (74.2%)	45 (76.3%)
Distance from pouch to stoma (cm), (range)	30 (30-50)	30 (30-50)	40 (30-50)	< 0.001
IPAA dehiscence
Yes	6 (6.7%)	0	6 (10.2%)	0.072
None	84 (93.3%)	31 (100%)	53 (89.8%)
Postoperative complications (Clavien-Dindo classification)
Grade 1 or less	47 (52.2%)	15 (48.4%)	32 (54.2%)	0.598
Grade 2 or higher	43 (47.8%)	16 (51.6%)	27 (45.8%)

¹Variables are indicated by median.