Table 2. Univariate associations between leukocytosis and outcomes.

Variable	WBC<11k		WBC> = 11k		n	p-value
	n		n
	10116		863		10979
Operative Time	263.150	103.621	259.424	111.314	10976	0.343
Blood Transfusions	3311/10116	32.7%	303/863	35.1%	10979	0.164
Total Hospital Stay (days)	9.878	9.786	11.648	8.722	10960	<0.001
30-Day Mortality	253/10116	2.5%	33/863	3.8%	10979	0.026	*
Wound Complications (composite)	405/10116	4.0%	47/863	5.4%	10979	0.050
Superficial Incisional SSI	311/10116	3.1%	31/863	3.6%	10979	0.460
Deep Incisional SSI	44/10116	0.4%	5/863	0.6%	10979	0.730
Organ/Space SSI	29/10116	0.3%	6/863	0.7%	10979	0.084
Wound Disruption	42/10116	0.4%	11/863	1.3%	10979	0.001	*
Medical Complications (composite)	1513/10116	15.0%	197/863	22.8%	10979	<0.001	*
Unplanned Reintubation	343/10116	3.4%	39/863	4.5%	10979	0.101
Pulmonary Embolism	60/10116	0.6%	10/863	1.2%	10979	0.075
On Ventilator > 48 Hours	604/10116	6.0%	102/863	11.8%	10979	<0.001	*
Progressive Renal Insufficiency	90/10116	0.9%	11/863	1.3%	10979	0.341
Acute Renal Failure	178/10116	1.8%	26/863	3.0%	10979	0.013	*
Urinary Tract Infection	197/10116	1.9%	19/863	2.2%	10979	0.698
Stroke/CVA	171/10116	1.7%	24/863	2.8%	10979	0.028	*
Coma Greater Than 24 Hours	22/10116	0.2%	4/863	0.5%	10979	0.288
Cardiac Arrest Requiring CPR	209/10116	2.1%	15/863	1.7%	10979	0.597
Myocardial Infarction	54/10116	0.5%	6/863	0.7%	10979	0.706
Pneumonia	365/10116	3.6%	54/863	6.3%	10979	<0.001	*
Deep Venous Thrombosis	149/10116	1.5%	25/863	2.9%	10979	0.002	*
Sepsis	170/10116	1.7%	26/863	3.0%	10979	0.007	*
Septic Shock	125/10116	1.2%	13/863	1.5%	10979	0.599

Univariate associations between leukocytosis (>11,000 white blood cell count per microliter) and outcomes. Continuous variables are expressed as a mean and standard deviation, while categorical variables are expressed as a proportion and percentage. SSI = Surgical Site Infection; CVA = Cerebrovascular Accident; CPR: Cardiopulmonary Resuscitation

* indicates statistically significant p-values at the 0.05 significance level.