Table 7.

Cox Proportional Hazards for outcome of restenosis

	Univariate Model		Multiple Variable Model
	HR (95% CI)	P-value	HR (95% CI)	P-value
CKD Stage			**
5	1.4 (0.8–2.3)	0.26
4/3b	0.9 (0.6–1.3)	0.61
1/2/3a	1.0 (reference)
Age, per 10 years	1.0 (0.9–1.2)	0.61	**
Gender
Female	1.5 (1.1–1.9)	0.007	1.5 (1.2–2.0)
Male	1.0 (reference)		1.0 (reference)	0.003
Smoking Status			**
Current	0.9 (0.6–1.3)	0.52
Former	0.7 (0.5–0.99)	0.047
Never	1.0 (reference)
Diabetes			**
Yes	1.2 (0.9–1.6)	0.15
No	1.0 (reference)
Coronary arterial disease			**
Yes	0.9 (0.7–1.2)	0.57
No	1.0 (reference)
TASC Class
C or D	1.4 (1.03–1.9)	0.03	1.4 (1.02–1.9)	0.04
A or B	1.0 (reference)		1.0 (reference)
Treatment			**
Plain old balloon angioplasty	1.0 (0.8–1.4)	0.82
Stent	1.0 (reference)
Run-off Score			**
0 or 1	1.1 (0.8–1.6)	0.45
2	0.9 (0.7–1.3)	0.67
3	1.0 (reference)

^**Variable not retained using backward selection method, alpha-level = 0.05 for retention.