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Table 2 Effect of treatment pre vs post operatively in the unilateral group

From: Is simultaneous bilateral total hip arthroplasty deleterious in a biomechanical point of view? A comparative gait analysis study

 

PRE

MEAN (SD)

POST

MEAN (SD)

p

Spatio temporal

Speed (km/h)

2.58 (0.81)

2.54 (0.85)

0.844

Step length (m)

0.451 (0.1)

0.468 (0.07)

0.587

Cadence (step/min)

106.5 (13.2)

102.5 (16.9)

0.236

Kinematics

ROM pelvis sagittal (°)

4.06 (0.9)

3.34 (1.1)

0.031*

ROM hip sagittal (°)

28.54 (8.7)

33.31 (6.4)

0.052

ROM knee sagittal stance (°)

2.16 (4.7)

1.08 (4.6)

0.379

ROM knee sagittal swing (°)

39.27 (13.3)

44.13 (9.6)

0.111

ROM ankle sagittal (°)

18.37 (5.5)

18.15 (4.1)

0.894

ROM pelvis frontal (°)

4.84 (2.6)

4.16 (1.3)

0.292

ROM hip frontal (°)

7.52 (4.4)

7.62 (2.8)

0.923

ROM pelvis transverse (°)

5.36 (2.9)

6.08 (3.1)

0.284

Kinetics

Hip Moment extension (N m/kg)

0.424 (0.13)

0.46 (0.18)

0.403

Hip Moment flexion (N m/kg)

- 0.281 (0.18)

- 0.37 (0.25)

0.183

Mechanics

External work (J/kg m)

0.581 (0.31)

0.357 (0.21)

0.010*

Internal work (J/kg m)

0.195 (0.04)

0.198 (0.05)

0.824

Total work (J/kg m)

0.776 (0.29)

0.555 (0.21)

0.007*

Recovery (%)

26.2 (15.6)

46.6 (17.4)

< 0.001*

Energetics

Cost (J/kg m)

2.934(0.83)

2.981 (0.52)

0.791

Efficiency (%)

24.18 (7.6)

20.64 (11)

0.346

Oxford score (/48)

 

24.8 (9.2)

41.6 (5.1)

< 0.001*

SF36-PC (%)

 

34.8 (7.3)

49.6 (6.8)

< 0.001*

SF36-MC (%)

 

44.6 (9.8)

55.5 (4.2)

0.006*

  1. Legend: values are expressed as mean and standard deviation (SD). Speed values are in kilometres per hour (km/h), step length in meter (m), cadence in step per minute (step/min). Kinematics values are in degrees (°). Kinetics values in Newton meter per kilogram (Nm/Kg). Mechanics values in joules per kilogram meter (J/Kg.m). Recovery and efficiency in percentage (%). Note: ( ) indicates significant differences between PRE-MEAN and POST-MEAN (p < 0.05)