Table 2.

Multivariable analysis of independent risk factors for DVT

Perioperative factors	P value	OR	95% CI
Surgical site
THA	1.00 (reference)	–	–
TKA	0.034	1.836	(1.047–3.222)
Age (years)
≤ 60	1.00 (reference)	–	–
> 60 to ≤ 70	0.614	1.178	(0.624–2.223)
> 70	0.028	1.991	(1.007–3.683)
Drain use
No	1.00 (reference)	–	–
Yes	0.003	4.920	(1.732–14.050)
Ambulation time
≤ 24 h	1.00 (reference)	–	–
> 24 h to ≤ 48 h	0.310	1.669	(0.620–4.495)
> 48 h to ≤ 72 h	0.083	2.174	(0.904–5.229)
≥ 72 h	0.000	6.166	(2.859–13.301)

DVT deep vein thrombosis