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Table 1 Baseline patient characteristics. Data presented as mean (standard deviation) or number and absolute percentages

From: Perioperative blood management programme reduces the use of allogenic blood transfusion in patients undergoing total hip and knee arthroplasty

  Usual Care group Intervention group p
N = 100 N = 100
Sex; M:F 26:74 32:68 0.350
Age; years (SD, range) 68.1 (9.7, 46–94) 67.2 (10.9, 13–88) 0.547
Weight; kg (SD, range) 81.6 (17.8, 46–130) 83 (18.5, 50–137) 0.566
Body mass index; kg m−2 31.7 (6.4) 31.4 (6.7) 0.757
American Society Anesthesiology Status    
 1 4 3  
 2 56 73 0.971
 3 39 23  
 4 1 1  
Comorbidities    
 Cardiac disease 18 17 0.852
 Hypertension 65 62 0.660
 Diabetes mellitus 22 16 0.280
 Peripheral vascular disease 4 2 0.407
 Cerebrovascular disease 6 1 0.054
 Pulmonary embolus 1 0 0.316
 Deep venous thrombosis 4 7 0.352
 Renal impairment 5 11 0.118
 Active smoker 10 5 0.180
 Previous smoker 33 39 0.377
 Chronic obstructive airways disease 20 21 0.861
 Other 71 78 0.256
Preoperative medications    
 Aspirin 17 17 1.000
 Clopidogrel 1 0 0.316
 Warfarin 0 0 1.000
 Non steroidal anti-inflammatory drugs 28 19 0.133