. Author manuscript; available in PMC: 2017 Feb 1.

Published in final edited form as: Ann Vasc Surg. 2015 Nov 23;31:124–133. doi: 10.1016/j.avsg.2015.08.017

Table VII.

Multivariate analysis for independent association with 30-day mortality and length of stay, subgroup

Pre-operative Variable^*	30-day mortality ^†		Length of Stay ^‡
Pre-operative Variable^*	P	OR (95% CI)	P	(95% CI)(days)
African-American race	-	-	ns	ns
Previous Smoker	ns	ns	-	-
Current Smoker	ns	ns	-	-
Fully Independent	ns	ns	ns	ns
Partially Dependent	ns	ns	-	-
Diabetes Mellitus	-	-	ns	ns
Septic Shock	ns	ns	-	-
Platelets < 250 ×10⁶/mL	<.001	10.2 (2.9, 45.9)	-	-
INR > 1.3	ns	ns	-	-
WBC > 12 ×10⁶/mL	-	-	.01	5.2 (1.1, 9.3)
PCV < 31%	ns	ns	-	-
Guillotine amputation	ns	ns	-	-

INR, international normalized ratio; WBC, white blood cells; PCV, packed cell volume; OR, odds ratio; CI, confidence interval; ns, not significant

Continuous variables have been dichotomized;

^†

n = 180, multivariate stepwise logistic regression; constant = 3.6, Chi-square = 17.0, R² = .10, P < .001;

^‡

n = 159 patients, multivariate stepwise linear regression; constant = 5.6 days, R² = 0.04, F = 6.2, P = .01