Comparative analysis of endoscopic precut conventional and needle knife sphincterotomy

Table 1 Patient characteristics-risk factor

	Needle-knife PNK (n = 84)	Conventional PCS (n = 59)	P value
Female	43	38	0.16
Age < 50 yr	16	7	0.36
Bilirubin level (norm)	8	10	0.30
Concomitant systemic diseases	20	6	0.06
Neoplasms	26	17	0.96
Retention cause
Choledocholithiasis	24	23	0.26
Papillar stenosis	14	10	0.85
Distal stenosis	18	13	0.70
Middle stenosis	3	5	0.37
Hilum stenosis	5	4	0.88
Anatomy of the papilla
Flat	28	23	0.60
Prominent	32	23	0.94
In diverticulum	12	10	0.84
Tumor	18	5	0.06
Biliary duct diameter
(mean)	14.49	14.07	0.42
(< 9 mm)	18	13	0.90
Accesory procedures
Prosthesis implantation
CBD	65	51	0.83
Wirsung	11	2	0.08
Prosthesis in CBD diam. (mean)	6.01	5.89	0.59
Pathological sampling	12	3	0.13

CBD: Common bile duct; PCS: Pre-cut conventional sphincterotomy; PNK: Pre-cut needle knife.