Table 3.

Comparison of visual analogue scale scores between the two groups

Point, M (IQR)	Double-stent group (n = 40)	Single-stent group (n = 38)	P value
Preoperative	0 (2)	0 (2)	0.655
After 1 week	0 (1)	0 (2)	0.065
After 1 month	0 (2)	2.5 (4)	0.002
After 2 months	0 (1)	3 (4)	< 0.001
After 3 months	0 (1)	4 (2)	< 0.001
After 6 months	1.5 (3)	4 (1)	< 0.001

The double-stent group underwent endoscopic retrograde cholangiopancreatography with a fully-covered self-expandable metallic biliary stent and a pancreatic duct stent, while the single-stent group underwent a fully-covered self-expandable metallic biliary stent only. M: Median; IQR: Interquartile range.