Table 2.

Risk of venous thromboembolic event within 90 days of surgery for patients undergoing total knee arthroplasty or total hip arthroplasty with COVID infection within 6 months, 12 weeks, and 6 weeks of surgery (univariable analysis) compared with non-infected with the same follow-up

Follow-up or COVID infection at	COVID infection		No COVID infection		Rate ratio (CI)
	Total, n	Developed VTE, n (%)	Total, n	Developed VTE, n (%)
6 months	1,147	4 (0.35)	32,373	110 (0.34)	1.0 (0.38–2.8)
12 weeks	553	2 (0.36)	32,967	112 (0.34)	1.1 (0.26–4.3)
6 weeks	232	1 (0.43)	33,288	113 (0.34)	1.3 (0.18–9.1)