Table 2.

Comparison of effectiveness of plastic stent and self-expandable metal stent placement in the management of malignant biliary obstruction

Effectiveness of stent placement
	Plastic stent (n = 153)	SEMS (n = 111)	p Value
Technical success rate	98.79%	100%	0.5108
Functional success rate	86.27%	90.09%	0.4553
Mean stent patency	10.28 ± 10.02	22.16 ± 22.23	< 0.001

Effectiveness of stent type
Plastic stent		p Value	SEMS		p Value
Technical success rate
7-Fr (n = 21)	100%	0.6285	Covered (n = 64)	100%	0.9999
10-Fr (n = 72)	97.22%		Partially covered (n = 10)	100%
Multiple stenting (n = 60)
	100%		Uncovered (n = 37)	100%
Functional success rate
7-Fr (n = 21)	85.71%	0.5519	Covered (n = 64)	85.59%	0.2898
10-Fr (n = 72)	83.33%		Partially covered (n = 10)	100%
Multiple stenting (n = 60)	90.00%
			uncovered (n = 37)	94.59%
Mean stent patency
7-Fr (n = 21)	7.06	0.422	covered (n = 64)	21.35	0.9999
10-Fr (N = 72)	10.56		partially covered (n = 10)	22.53
Multiple stenting (n = 60)
	10.88		uncovered (n = 37)	22.8

SEMS self-expandable metal stent