Table 2

Comorbidities of patients with and without postoperative VTE

Comorbidities	Total		No VTE		VTE		P value*
	n=361 384		n=361 006 (99.90%)		n=378 (0.10%)
	n	%	n	%	n	%
ASA class ≥III	88 686	24.54	88 390	2.45	296	78.31	<0.001
Pulmonary disease	53 486	14.80	53 314	1.48	172	45.50	<0.001
Cardiac disease	35 282	9.76	25 163	0.70	119	31.48	<0.001
Esophageal/gastric/intestinal disease	61 259	16.95	61 084	1.69	175	46.30	<0.001
Neurological disease	86 080	23.82	85 912	2.38	168	44.44	<0.001
Hematological disease	10 984	3.04	10 916	0.30	68	17.99	<0.001
Preoperative steroids	8319	2.30	8243	0.23	76	20.11	<0.001
Preoperative transfusion	2948	0.82	2902	0.08	46	12.17	<0.001

*χ² test comparing patients with and without VTE. Bolding indicates statistical significance at p<0.006 (Bonferroni correction for multiple corrections).
ASA, American Society of Anesthesiologists; VTE, venous thromboembolism.