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Table 1 Demographic features and baseline data of study groups

From: Is lower tourniquet pressure during total knee arthroplasty effective? A prospective randomized controlled trial

  Conventional
[SBP + 150]
(n = 80)
Lower Pressure
[SBP + 120]
(n = 80)
P value
Age (years) 71.0 (6.2) 71.8 (6.8) 0.424
Sex: female 73 (91%) 68 (85%) 0.222
Height (cm) 152.4 (6.3) 152.8 (7.8) 0.784
Weight (kg) 63.3 (9.9) 64.0 (11.1) 0.646
BMI (kg/m2) 27.1 (3.3) 27.4 (4.0) 0.647
Thigh circumference (cm) 47.2 (5.1) 49.2 (5.5) 0.145
Hypertension 55 (70%) 53 (66%) 0.647
Diagnosis
 Primary osteoarthritis 78 (97%) 76 (94%) 0.330
 Secondary osteoarthritis 0 0%) 2 (3%)
 Inflammatory arthritis 2 (3%) 3 (3%)
Operated side: Right 35 (44%) 42 (53%) 0.268
Operation type
 Unilateral TKA 38 (48%) 28 (35%) 0.261
 Staged TKA: 1st 22 (28%) 29 (36%)
 Staged TKA: 2nd 20 (25%) 23 (29%)
Implant
 e-motion PS Pro® 57 (71%) 64 (80%) 0.197
 Genesis II® 23 (29%) 16 (20%)
Operation method
 Conventional 63 (79%) 68 (85%) 0.305
 Navigation 17 (21%) 12 (15%)
Pre-inflation SBP (mmHg) 105.1 (15.9) 111.2 (14.8) 0.012
Initial tourniquet pressure (mmHg) 255.0 (18.1) 233.9 (15.5) <  0.001
Tourniquet time (min) 83.1 (9.1) 82.1 (9.2) 0.486
Operative time (min) 99.3 (16.0) 99.5 (15.7) 0.925
Maximum intraoperative SBP (mmHg) 124.1 (16.8) 121.4 (15.1) 0.278
Preoperative hemoglobin (g/dL) 12.4 (1.96) 12.1 (2.1) 0.406
  1. Data are presented as mean with the standard deviation in parentheses or number with the percentage in parentheses
  2. BMI body mass index, TKA total knee arthroplasty, SBP systolic blood pressure