Establishment of predictive models and determinants of preoperative gastric retention in endoscopic retrograde cholangiopancreatography

Table 1 Comparison of general data between the validation and modeling groups

General information		The validation groups (n = 38)	The modeling groups (n = 152)	t/χ2	P value
Age (years)		60.83 ± 12.16	61.52 ± 11.85	0.319	0.750
Gender	Male	16	92	4.205	0.122
	Female	22	60
BMI (kg/m2)		21.16 ± 2.46	21.37 ± 2.11	0.530	0.597
Primary disease	Malignant biliary and pancreatic tumors	20	77	0.047	0.977
	Other biliary diseases	18	75
Hypertension	Yes	8	35	0.068	0.967
	No	30	117
Diabetes	Yes	7	30	0.034	0.983
	No	31	122
Jaundice	Yes	12	62	1.085	0.581
	No	26	90
Opioid use	Yes	13	55	0.051	0.975
	No	25	97
Gastrointestinal obstruction	Yes	15	58	0.022	0.989
	No	23	94

BMI: Body mass index.