The Regularity of the Site of Impaction in Recurrent Gallstone Ileus: A Systematic Review and Meta-Analysis of Reported Cases

Table 3

Logistic regression analysis of the factors affecting the risk of RSOI (ileum).

Variable	OR	Univariate analysis		value	OR	Multivariate analysis		value
		95% CI				95% CI
		Lower	Upper			Lower	Upper
Large stone (IGSI)	0.19	0.03	1.30	0.091	0.17	0.01	3.01	0.225
Sex (women)	1.44	0.21	9.66	0.37	8.35	0.21	324.6	0.256
Number of stones (IGSI)	1.03	0.30	3.57	0.97
Age	0.98	0.93	1.04	0.543
ISOI (ileum)	20.2	3.8	106.4	<0.001	36.5	2.50	532.6	0.009

The area under the ROC curve: 0.884; Hosmer–Lemeshow goodness-of-fit statistic value = 0.56; multicollinearity was not found among the independent variables used for multivariate analysis. RSOI: site of impaction at the RGSI; RGSI: recurrent gallstone ileus; OR: odds ratio; CI: confidence interval; ISOI: site of impaction at the IGSI; IGSI: index gallstone ileus.