Fully covered metal biliary stents confer a higher risk of post-endoscopic retrograde cholangiopancreatography pancreatitis

Table 4 Comparison of baseline characteristics after propensity score matching, n (%)

	Unmatched cohort			Matched cohort
	FCSEMS (n = 319)	Non-FCSEMS (n = 3082)	SMD	FCSEMS (n = 319)	Non-FCSEMS (n = 319)	SMD
Age, mean ± SD, years	66.6 ± 15.8	63.2 ± 18.3	0.198	66.6 ± 15.8	66.9 ± 15.2	0.021
Female	148 (46)	1682 (55)	0.165	148 (46)	150 (47)	0.031
Benign indication	186 (58)	1800 (58)	0.708	186 (58)	203 (64)	0.109
Biliary sphincterotomy	190 (60)	1710 (56)	0.087	190 (60)	171 (54)	0.120
Precut sphincterotomy	11 (4)	222 (7)	0.027	11 (4)	23 (7)	0.168
Sphincteroplasty	20 (6)	155 (5)	0.004	20 (6)	16 (5)	0.054
Rectal indomethacin	77 (24)	820 (27)	0.047	77 (24)	85 (27)	0.058
PD stent	34 (11)	0 (0)	0.050	34 (11)	0 (0)	0.050

FCSEMS: Fully covered self-expanding metal stents; PD: Pancreatic duct stent; SD: Standard deviation; SMD: Standardized mean difference.