Table 2.

Rates of and independent factors associated with early versus late venous thromboembolism (VTE)

Risk factor	Any VTE	Early VTE	Early VTE			Late VTE	Late VTE
			OR	95% CI	P-value		OR	95% CI	P-value
Preoperative factors
Age ≥75 years	3.8%	3.2%	1.92	1.19–3.10	0.007
Male	3.6%	2.7%	1.87	1.26–2.76	0.002
Intraoperative factors
Intraoperative transfusion	5.5%	4.5%	2.49	1.69–3.69	<0.001
Operative time >240 min	4.6%	3.4%	2.28	1.47–3.52	<0.001	1.2%	2.35	1.26–4.40	0.008
Postoperative factors
Organ space infection	10.0%	6.9%	2.60	1.61–4.19	<0.001	3.1%	3.78	1.87–7.66	<0.001
Return to operating room	12.5%	9.8%	3.25	1.97–5.37	<0.001	2.7%	2.84	1.27–6.33	0.011

P-values in bold indicate significance at P < 0.05.

Early, pre-discharge; late, post-discharge; OR, odds ratio; 95% CI, 95% confidence interval.