Risk factors for postoperative stoma outlet obstruction in ulcerative colitis

Table 4 Patients characteristics in relation to stoma sidedness with ileal pouch-anal anastomosis

	Overall (n = 90)	Right side (n = 31)	Left side (n = 59)	P value
Age1 (yr), (range)	41 (13-71)	41 (14-71)	41 (13-67)	0.690
Gender
Male	54 (60.0%)	17 (54.8%)	37 (62.7%)	0.469
Female	36 (40.0%)	14 (45.2%)	22 (37.3%)
Indication for surgery
Medical intractability	72 (80.0%)	26 (83.9%)	46 (78.0%)	0.506
Malignancy or dysplasia	18 (20.0%)	5 (16.1%)	13 (22.0%)
BMI1 (kg/m2), (range)	19.8 (13.9-36.1)	21.8 (16.0-27.8)	19.3 (13.9-36.1)	0.023
Mayo endoscopic score1 (range)	3 (0-3)	3 (0-3)	3 (0-3)	0.878
Extent of disease
Pancolitis	84 (93.3%)	29 (93.5%)	55 (93.2%)	0.662
Left-sided colitis	6 (6.7%)	2 (6.5%)	4 (6.8%)
Proctitis	0	0	0
Disease duration1 (mo), (range)	38 (1-336)	21 (1-252)	56 (1-336)	0.016
Disease severity
Mild	17 (18.9%)	6 (19.4%)	11 (18.6%)	0.471
Moderate	44 (48.9%)	12 (38.7%)	32 (54.2%)
Severe	21 (23.3%)	9 (29.0%)	12 (20.3%)
Fulminant	8 (8.9%)	4 (12.9%)	4 (6.8%)
Total glucocorticoid dose from onset of UC to surgery2
10000 mg or more	7 (9.3%)	2 (8.7%)	5 (9.4%)	0.644
Less than 10000 mg	69 (90.7%)	21 (91.3%)	48 (90.6%)
Total glucocorticoid dose 1 mo before surgery1 (mg), (range)	0 (0-1000)	0 (0-595)	0 (0-1000)	0.955
Preoperative total protein level1 (g/dL), (range)	6.45 (4.2-9.3)	6.4 (4.2-8.5)	6.45 (4.2-9.3)	0.919
Preoperative albumin level1 (g/dL), (range)	3.45 (1.8-4.9)	3.6 (2.1-4.8)	3.4 (1.8-4.9)	0.586
Preoperative white blood cell count1 (cells/μL), (range)	7315 (2660-20080)	6120 (2660-10630)	8770 (2850-20080)	< 0.001
Preoperative C-reactive protein level1 (mg/dL), (range)	0.78 (0.01-17.41)	0.48 (0.01-8.78)	1.06 (0.02-17.41)	0.155
Onodera Prognostic Nutritional index1 (range)	41.4 (22.2-57.5)	39.6 (24.7-57.5)	42.0 (22.2-57.5)	0.977

¹Variables are indicated by median.

²Variable is unknown in 14 patients. BMI: Body mass index; UC: Ulcerative colitis.