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Table 2 Demographic characteristics of postoperative venous thromboembolism (VTE)

From: Which orally administered antithrombotic agent is most effective for preventing venous thromboembolism after total knee arthroplasty? A propensity score-matching analysis

  Postoperative VTE (−) (n = 676) Postoperative VTE (+) (n = 123) Total (n = 799) RR (95% CI) p value
Age (years) 71.2 ± 7.1 71.9 ± 5.6    0.229
Sex
 Male 79 (95.2) 4 (4.8) 83 3.94 (1.42–11.0) 0.005
 Female 597 (83.4) 119 (16.6) 716
Body mass index (kg/m2) 26.7 ± 3.5 27.1 ± 3.4    0.349
Type of surgery
 Unilateral 385 (87.9) 53 (12.1) 438 1.75 (1.19–2.58) 0.004
 Staged bilateral 291 (80.6) 70 (19.4) 361
aPrevious agents
 No 534 (85.0) 94 (15.0) 628 1.16 (0.74–1.83) 0.522
 Yes 142 (83.0) 29 (17.0) 171
  1. Values are presented as mean ± standard deviation or number (%). The statistical significance was set at p < 0.05
  2. VTE venous thromboembolism, RR relative risk, CI confidence interval
  3. aPreviously prescribed anticoagulant agents for other diseases regardless of total knee arthroplasty (TKA)