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Table 2 Comparison of demographic parameters of patients with and without DVT

From: Plasma D-dimer is not useful in the prediction of deep vein thrombosis after total knee arthroplasty in patients using rivaroxaban for thromboprophylaxis

  DVT  
Variables Yes No p value
  (N = 29) (N = 171)  
Male sex (F/M) 25/4 124/47 0.12
ASA score ≥ 3 [no./total no.(%)] 13/29(44.8%) 61/171(35.7%) 0.35
Age (years) 71.0 ± 6.9 69.0 ± 7.0 0.16
BMI (kg/m2) 26.5 ± 3.9 27.8 ± 3.5 0.07
Obesity (BMI ≥ 27, no.) 15 102 0.42
Pre-operative laboratory data
 Hemoglobin (g/dl) 12.6 ± 0.9 13.4 ± 1.1 < 0.01
 Platelet count (109cells/L) 249.2 ± 59.8 228.7 ± 55.1 0.27
  PT INR 1.0 ± 0.04 1.0 ± 0.6 0.67
  aPTT INR 1.0 ± 0.1 1.0 ± 0.1 0.28
Types of anesthesia (no.)    0.61
 General anesthesia 25 139  
 Spinal anesthesia 4 32  
Total blood loss (ml) 989.8 ± 300.3 1056.6 ± 335.7 0.32
Blood transfusion 0/29(0%) 8/171(4.7%) 0.61
  1. All data are expressed as mean ± standard deviation
  2. ASA American Society of Anesthesiologists, BMI Body mass index, INR International normalized ratio, PT Prothrombin time, aPTT Activated partial thromboplastin time