Table 1. Baseline Patient Characteristics in Two Groups.

	CMS Group	DJS Group	P
Age (y)*	52.5 ± 8.2	54.3 ± 13.8	0.725
Sex			0.764
Male	4	3
Female	6	6
Side of obstruction			0.102
Right	7	3
Left	3	3
Bilateral	0	3
Site of obstruction			0.153
Proximal	4	1
Distal	2	6
Diffuse†	4	5
Cause of obstruction			0.993
Stomach cancer	8	7
Colorectal cancer	1	1
Gynecological cancer	1	1

^*Mean ± standard deviation, ^†Obstruction in more than two sites.

CMS = covered metallic ureteral stent, DJS = double-J ureteral stent