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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