Table 4.

Cox Proportional Hazards for outcome of major adverse limb events

	Univariate Model		Multiple Variable Model
	HR (95% CI)	P-value	HR (95% CI)	P-value
CKD Stage			**
5	1.8 (0.96–3.2)	0.07
4/3b	0.7 (0.4–1.4)	0.29
1/2/3a	1.0 (reference)
Gender			**
Female	0.8 (0.5–1.2)	0.28
Male	1.0 (reference)
Smoking Status			**
Current	1.1 (0.5–2.5)	0.79
Former	1.2 (0.8–2.3)	0.28
Never	1.0 (reference)
Diabetes			**
Yes	1.7 (0.9–3.1)	0.10
No	1.0 (reference)
Coronary arterial disease			**
Yes	1.8 (1.01–3.3)	0.048
No	1.0 (reference)
TASC Class			**
C or D	1.3 (0.8–2.2)	0.37
A or B	1.0 (reference)
Treatment			**
Plain old balloon angioplasty	0.9 (0.6–1.5)	0.81
Stent	1.0 (reference)
Run-off Score			**
0 or 1	1.4 (0.7–2.9)	0.35
2	1.1 (0.5–2.2)	0.87
3	1.0 (reference)
GFR, per 5 units <45	1.04 (0.98–1.10)	0.21	**

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