Prognostic factors of response to endoscopic treatment in painful chronic pancreatitis

Table 6 Endoscopic drainage (endoscopic retrograde cholangiopancreatography and procedures/patients) according to initial pancreatography changes (n = 122)

	Stones,	Strictures,	Strictures + stones, n = 20	P value
	n = 17	n = 85
ERCP/patient1	2 (1-3)	2 (1-2)c	2 (2-3)c	< 0.001
Procedures/patient1	3 (2-5)a	2 (1-3)c	4 (3-4)ac	< 0.001
Only one procedure	0	23	0	< 0.001
Multiple procedures	17	62	20	< 0.001
Clinical success	13	69	19	0.221

¹Data are presented as median (IQR).

^aP < 0.05, vs the groups with Stones to the group Strictures + Stones had a;

^cP < 0.05, vs the groups with Strictures to the group Strictures + Stones had a. IQR: Interquartile range; ERCP: Endoscopic retrograde cholangiopancreatography.