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Table 3 Postoperative kinetics and kinematics during stance phase for the operated side, non-operated side and healthy controls

From: Are changes in radiological leg alignment and femoral parameters after total hip replacement responsible for joint loading during gait?

 

operated side

non-operated side

healthy controls

operated vs. non-operated

operated vs. healthy controls

non-operated vs. healthy controls

Kinetics

 KAM_1 (Nmkg− 1)

0.42 (0.16)

0.40 (0.18)

0.45 (0.16)

P = 0.590

P = 0.436*

P = 0.945*

 KAM_2 (Nmkg− 1)

0.36 (0.13)

0.37 (0.15)

0.43 (0.14)

P = 0.737

P = 0.670*

P = 0.704*

 HAM_1 (Nmkg− 1)

0.80 (0.15)

0.88 (0.18)

0.90 (0.21)

P = 0.025

P = 0.379

P = 0.904

 HAM_2 (Nmkg− 1)

0.76 (0.17)

0.73 (0.16)

0.76 (0.23)

P = 0.451

P = 0.601

P = 0.678

Kinematics

 FPA (°)

−10.3 (5.1)

−8.6 (4.5)

−5.9 (3.2)

P = 0.198

P = 0.056

P = 0.119

 KneeFlex (°)

17.9 (5.3)

19.9 (5.8)

21.1 (3.9)

P = 0.029

P = 0.085

P = 0.943

 KneeExt (°)

6.3 (6.1)

5.3 (6.3)

3.2 (3.4)

P = 0.380

P = 0.651*

P = 0.662

 KneeRoM (°)

11.6 (5.0)

14.6 (6.3)

17.8 (4.3)

P = 0.004

P = 0.013*

P = 0.607*

 LTD (°)

−3.0 (2.0)

−1.3 (2.2)

−1.9 (1.9)

P = 0.055

P = 0.243

P = 0.614

 HipAdd_1 (°)

6.4 (3.9)

6.0 (5.8)

6.8 (5.0)

P = 0.688

P = 0.944

P = 0.428

 HipAdd_2 (°)

6.3 (2.7)

4.1 (4.3)

4.7 (4.8)

P = 0.034

P = 0.300

P = 0.437

 HipFlex (°)

31.9 (6.7)

33.6 (7.0)

33.9 (5.7)

P = 0.042

P = 0.472

P = 0.748

 HipExt (°)

−7.7 (9.7)

−9.1 (9.8)

−11.0 (7.1)

P = 0.344

P = 0.445

P = 0.713

 HipRoM (°)

38.0 (5.4)

41.4 (7.5)

43.7 (3.7)

P = 0.045

P = 0.014

P = 0.848

  1. Mean values with standard deviation in parenthesis. Comparison between operated and non-operated side (Paired-Samples T-Tests) as well as between operated/non-operated side and healthy controls (Univariate Analysis of Variance). KAM_1 = maximum external knee adduction moment in first phase of stance; KAM_2 = maximum external knee adduction moment in second phase of stance; HAM_1 = maximum external hip adduction moment in first phase of stance; HAM_2 = maximum external hip adduction moment in second phase of stance; FPA = mean foot progression angle in the transverse plane (external rotation (−)); KneeFlex = maximum knee flexion during stance (flexion (+) / extension (−)); KneeExt = maximum knee extension during stance (flexion (+) / extension (−)); KneeRoM = knee range of motion in the sagittal plane during stance; LTD = maximum lateral trunk displacement in the frontal plane during stance (towards the affected stance limb (−)); HipAdd_1 = maximum hip adduction during first phase of stance (adduction (+)); HipAdd_2 = maximum hip adduction during second phase of stance (adduction (+)); HipFlex = maximum hip flexion during stance (flexion (+) / extension (−)); HipExt = maximum hip extension during stance (flexion (+) / extension (−)); HipRoM = hip range of motion in the sagittal plane during stance; significant differences are bold printed;* significant effect of speed