Table 5.

Preoperative endoscopic treatment of both groups

	Preoperative periods (days) median (range)	Decompressi on periods (days) average (range)	Stent patency Periods (days) average (range)	Stent obstruction case (percentage)	Re-intervention by obstruction times (average)	Stent diameter (7Fr/8.5 F r/10Fr)	Stent number (1/2/3)
Conventional stent group	96.3 (10–448)	18.0 (1–81)	49.1 (9–136)	15 (46.9%)	1.03	26/3/3	24/6/2
Inside stent group	96.8 (14–387)	12.9 (1–36)	85.2 (13–387)	7 (28%)	0.32	9/13/3	23/2/0
P value	0.979	0.438	0.009	0.150	0.026	0.820	0.283