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Table 2 Laboratorial, clinical and radiographic data

From: Comparison of a minimally invasive posterior approach and the standard posterior approach for total hip arthroplasty A prospective and comparative study

Parameter

Standard approach

Mini-posterior ap.

p

CPK-diff 24 h - preop [U/l]

569.8 ± 535.1

551.0 ± 295.6

p = 0.829

CKMM-diff 24 h - preop [U/l]

553.8 ± 530.0

548.7 ± 290.2

p = 0.952

Myoglobin-diff 24 h - preop [μg/l]

205.4 ± 195.0

178.6 ± 143.4

p = 0.336

CPK-diff 48 h - preop [U/l]

378.4 ± 218.4

446.3 ± 236.9

p = 0.141

CKMM-diff 48 h - preop [U/l]

378.2 ± 218.5

437.4 ± 241.9

p = 0.204

Myoglobin-diff 48 h - preop [μg/l]

78.8 ± 88.4

59.9 ± 74.2

p = 0.254

CRP-diff day 3 - preop [mg/l]

77.5 ± 38.5

80.1 ± 56.6

p = 0.633

Operation time [minutes]

50.9 ± 10.2

51.9 ± 11.4

p = 0.892

Blood loss intraoperative [ml]

382.0 ± 179.9

262.7 ± 149.7

p < 0.001

Blood loss Cell Saver 6 hours postop [ml]

515.2 ± 348.8

279.0 ± 194.1

p < 0.001

Blood loss Redon [ml]

434.0 ± 188.6

352.4 ± 207.2

p = 0.043

Blood loss total [ml]

1331.2 ± 538.6

894.2 ± 363.3

p < 0.001

Retransfusion cellsaver [n of patients]

13

5

p = 0.037

Transfusion foreign blood [n of patients]

3

3

p = 1.0

Hb-diff day 3 - preop [g/dl]

3.5 ± 1.57

3.48 ± 1.42

p = 0.953

Pain at rest [VAS]

1.11 ± 1.1

0.63 ± 0.67

p = 0.01

Pain in motion [VAS]

2.82 ± 1.49

2.57 ± 1.45

p = 0.386

Mobilisation alone on ward [days]

3.72 ± 2.03

2.7 ± 1.92

p = 0.049

Using stairs alone [days]

6.84 ± 2.35

5.37 ± 1.95

p = 0.011

Hospital stay [days]

11.56 ± 3.45

9.96 ± 3.02

p = 0.016

SF-36 functional score preop

26.43 ± 11.79

26.37 ± 10.69

p = 0.901

SF-36 funct. score 6 weeks post

37.45 ± 15.78

37.53 ± 16.24

p = 0.89

SF-36 psychological score preop

43.47 ± 25.87

48.18 ± 27.45

p = 0.523

SF-36 psych. Score 6 weeks post

51.39 ± 29.58

52.28 ± 29.62

p = 0.763

WOMAC preop

62.7 ± 23.6

60.5 ± 19.8

p = 0.824

WOMAC 6 weeks postop

24.1 ± 21.7

22.8 ± 17.2

p = 0.777

Oxford hip score preop

41.6 ± 9.2

40.7 ± 6.6

p = 0.665

Oxford hip score 6 weeks postop

28.6 ± 10.6

25.5 ± 8.1

p = 0.126

Cup inclination [degrees]

42.8 ± 6.6

43.7 ± 5.9

p = 0.583

Cup anteversion [degrees]

24.6 ± 4.9

25.1 ± 5.2

p = 0.644

Stem alignment [degrees in varus]

0.9 ± 1.2

1.1 ± 1.1

p = 0.682

Limb length discrepancy [mm]

0.6 ± 2.7

0.4 ± 1.2

p = 0.581

Offset [mm]

2.8 ± 5.2

2.9 ± 4.3

p = 0.931