Table 2.

a. Univariable analysis for risk factors of new episodes of ASBO. b. Multivariable analysis

(a) Factor	ASBO (N, %)	OR	95% CI	P
Demographics
Gender
Male	5/29 (17.2%)	Ref
Female	13/93 (14.0%)	0.78	0.28–2.20	0.643
Age* (each year increase)	52.7 (± 15.5)*	1.02	0.98–1.06	0.448
Readmission for ASBO	53.0 (± 15.0)
No readmission for ASBO	51.1 (± 11.2)
Patient history
ASBO in history
No	1/ 62 (1.6%)	Ref
Yes	17/60 (28.3%)	20.8	2.80–156.4	0.003
Number of previous ASBO
No previous ASBO	1/62 (1.6%)	Ref
One episode of ASBO	2/19 (10.5%)	6.9	0.62–75.9	0.115
Multiple episodes of ASBO	15/41 (36.6%)	28.8	3.79–218.6	0.001
Treatment of previous ASBO
No ASBO	2/63 (3.2%)	Ref
Conservative	6/17 (35.3%)	14.8	2.97–73.2	0.001
Operative	10/42 (23.8%)	8.5	1.85–38.6	0.006
Number of previous surgery
One surgical procedure	3/18 (16.7%)	Ref
Multiple surgical procedures	15/104 (14.4%)	0.86	0.25–2.97	0.809
Type of previous surgery
Laparoscopy	2/24 (8.3%)	Ref
Laparotomy	16/98 (16.3%)	1.99	0.46–8.65	0.360
Diagnostic results
Extent of adhesions on CineMRI
Suspected single strand	2/32 (6.3%)	Ref
One quadrant	11/52 (21.2%)	3.78	0.84–17.1	0.084
Two quadrants	3/25 (11.8%)	2.00	0.33–11.9	0.449
Three or four quadrants	2/13 (15.4%)	2.58	0.36–18.3	0.343
Treatment of adhesion-related pain
Type of treatment
Non-operative	14 (26.4%)	Ref
Operative	4 (5.8%)	0.19	0.06–0.58	0.003
Type of surgery during elective adhesiolysis
Laparoscopy	1/33 (3.0%)	Ref
Conversion	1/17 (5.9%)	1.63	0.10–26.0	0.731
Laparotomy	2/19 (10.5%)	3.37	0.31–37.3	0.321

(b) Factor	OR	CI-95%	p-value
ASBO in history	19.2	2.54–144.4	0.004
Count of ASBO in history	NS	NS	NS
Treatment of ASBO	NS	NS	NS
Operative treatment (elective adhesiolysis)	0.21	0.07–0.65	0.007

*Mean and standard deviation of age

NS not selected for model in stepwise multivariable analysis