Predictors for success of non-operative management of adhesive small bowel obstruction

Table 1 Basic demographics in both groups, n (%)

	Group A (n = 90)	Group B (n = 162)	P value
Gender
Female	57 (36.3)	100 (63.7)
Male	33 (34.7)	62 (65.3)	0.80
Comorbidities	85 (36.2)	150 (63.8)
No comorbidities	5 (29.4)	12 (70.6)	0.57
No of previous abdominal surgery (mean ± SD)	1.92 ± 1.18	2.12 ± 1.44	0.28
Age (yr), mean ± SD	68.89 ± 17.37	68.13 ± 15.56	0.72

Table 2 Symptoms on presentation in both groups, n (%)

	Group A (n = 90)	Group B (n = 162)	P value
Nausea	56 (35.7)	101 (64.3)
No nausea	9 (37.5)	15 (62.5)	0.76
Vomiting	63 (34.2)	121 (65.8)
No vomiting	27 (39.7)	41 (60.3)	0.42
Abdominal pain	83 (35.3)	152 (64.7)
No pain	7 (41.2)	10 (58.8)	0.63
Abdominal distension	37 (37.0)	63 (63.0)
No distension	50 (33.8)	98 (66.2)	0.22
Flatus	37 (38.5)	59 (61.5)
No flatus	53 (34.0)	103 (66.0)	0.56
No obstipation	37 (31.9)	79 (68.1)
Obstipation	53 (39.0)	83 (61.0)	0.24

Table 3 Physiological and laboratory parameters on arrival in both groups

	Group A (mean ± SD)	Group B (mean ± SD)	P value
Heart rate (beat/min)	81.20 ± 15.67	82.89 ± 16.74	0.474
Systolic blood pressure (mmHg)	142.51 ± 26.97	146.79 ± 28.09	0.285
Diastolic blood pressure (mmHg)	69.65 ± 22.08	69.67 ± 20.17	0.994
Respiratory rate (/min)	20.15 ± 10.29	19.50 ± 3.68	0.559
Temperature (ºC)	36.56 ± 0.77	36.52 ± 0.72	0.697
White cell count (× 109/L)	12.27 ± 3.86	11.89 ± 3.96	0.495
C-reactive protein (mg/L)	24.96 ± 60.88	21.81 ± 45.25	0.691
Urea (mmol/L)	8.77 ± 6.81	9.40 ± 6.59	0.606
Creatinine (umol/L)	103.75 ± 55.35	110.00 ± 131.23	0.660
Lactate (mmol/L)	2.110 ± 0.97	1.942 ± 1.23	0.522

Table 4 The findings of computed tomography scan on presentation and abdominal X-ray following administration of water-soluble contrast medium in both groups, n (%)

	Group A (n = 90)	Group B (n = 162)	OR (95%CI)	P value
Definitive transition point	85 (94.4)	140 (86.4)	2.67 (0.975-7.318)	0.048
No transition point	5 (5.6)	22 (13.6)
Mesenteric stranding	64 (71.1)	96 (59.3)	1.69 (0.973-2.942)	0.061
No mesenteric stranding	26 (28.9)	66 (40.7)
Small bowel thickening	12 (13.3)	13 (8.0)	1.76 (0.768-4.084)	0.177
No small bowel thickening	78 (86.7)	149 (92)
Water-soluble contrast medium	42 (46.7)	98 (60.5)	0.55 (0.323-0.936)	0.024
Did not receive water-soluble contrast medium	47 (53.3)	60 (39.5)
Presence of free fluid	72 (80)	106 (65.4)	2.11 (1.149-3.888)	0.015
No free fluid	18 (20)	56 (34.6)
No small bowel faecal sign	42 (46.7)	55 (34.0)	1.70 (1.005-2.882)	0.047
Small bowel faecal sign present	48 (53.3)	107 (66.0)
Contrast reaches small bowel only	23 (25.6)	34 (21.0)	3.83 (1.790- 8.209)1	0.001
Contrast reach large bowel	19 (74.4)	76 (79.0)
Grade of obstruction (proximal small bowel diameter in mm), mean ± SD	36.87 ± 7.53	37.35 ± 6.77		0.601

¹Only patient done repeated abdominal X-ray.

OR: Odds ratio; CI: Confidence interval.