Table 2.

Comparison of outcomes between the two groups.

	3 min (n = 160)	1 min (n = 160)	P value
Complete stone removal	159 (99.4%)	158 (98.8%)	0.562
Mechanical lithotripsy	11 (6.9%)	13 (8.1%)	0.671
Complete stone removal in 1st session	136 (85.0%)	132 (82.5%)	0.544
Complete stone removal in 2nd session	23 (14.4%)	26 (16.3%)	0.641
Post-ERCP pancreatitis	7 (4.4%)	17 (10.6%)	0.034
Mild	6 (3.8%)	15 (9.4%)	0.042
Moderate	1 (0.6%)	1 (0.6%)	1.000
Severe	0 (0)	1 (0.6%)	0.317
Acute cholangitis	5 (3.1%)	6 (3.8%)	0.759
Perforation	2 (1.3%)	0 (0)	0.156
Bleeding	4 (2.5%)	6 (3.8%)	0.520
Hyperamylasaemia	5 (3.1%)	6 (3.8%)	0.759