Table 3.

Logistic regression analysis of risk factors influencing small bowel obstruction for patients with bezoars.

Variables	B	SE	Wald	P value	Odds ratio (95% CI)
Clinical characteristics
Age	0.022	0.022	1.054	0.305	1.02 (0.98–1.07)
Sex	0.177	0.564	0.098	0.754	1.19 (0.40–3.60)
Duration before admission	0.082	0.040	4.317	0.038	1.09 (1.01–1.17)
Bezoar features
Major diameter	3.835	1.025	14.006	0.0002	46.30 (6.21–345.03)
Volume	0.585	0.157	13.946	0.0002	1.80 (1.32–2.44)
CT value	−0.165	0.060	7.612	0.006	0.85 (0.75–0.95)
Location
Proximal	−1.865	1.129	2.731	0.098	0.16 (0.02–1.42)
Middle	−0.296	0.540	0.300	0.584	0.74 (0.26–2.15)
Distal	0.854	0.527	2.626	0.105	2.35 (0.84–6.60)
Type
Calcareous bezoar	−2.238	0.596	14.091	0.0002	0.11 (0.03–0.34)
Phytobezoar	2.064	0.582	12.552	0.0004	7.88 (2.51–24.66)

B: regression coefficient; SE: standard errors of regression coefficient.