Acute distal common bile duct angle is risk factor for post-endoscopic retrograde cholangiopancreatography pancreatitis in beginner endoscopist

Table 1 Baseline characteristics in both groups, n (%)

	Before propensity matching				After propensity matching
	Beginner (n = 97)	Expert (n = 196)	P value	D	Beginner (n = 69)	Expert (n = 69)	P value	D
Female	35 (36.1)	104 (53.1)	0.006	0.383	18 (26.1)	10 (14.5)	0.090	0.404
Age	69.8 ± 12.2	67.6± 12.3	0.143	0.179	71.8 ± 11.0	72.2 ± 10.7	0.790	0.037
Angle	29.5 ± 15.5	30.1 ± 16.1	0.752	0.038	29.6 ± 15.9	30.3 ± 16.4	0.789	0.043
Angle > 30 (%)	45 (46.4)	96 (49.0)	0.678	0.057	32 (46.4)	33 (47.8)	0.865	0.032
Bile duct dilatation	9.0 ± 3.3	8.2 ± 3.4	0.046	0.238	9.4 ± 3.3	10.0 ± 4.0	0.322	0.164
Benign Dz	78 (80.4)	132 (67.3)	0.019	0.380	63 (91.3)	64 (92.8)	0.753	0.109
Peripheral arterial disease	30 (30.9)	67 (34.2)	0.579	0.082	24 (34.8)	32 (46.4)	0.165	0.267
Erythema	10 (10.3)	26 (13.3)	0.470	0.158	8 (11.6)	11 (15.9)	0.459	0.203
Bulging	5 (5.2)	12 (6.1)	0.740	0.101	2 (2.9)	7 (10.1)	0.085	0.733