Lower Limb Loading during Gait in Patients Long Period after Total Hip Arthroplasty Revision
Table 2
Comparison of symmetry indexes [%] between groups.
Variable
One to 6 years
Six to 11 years
Over 11 years
Significance ()
Mean
Mdn
SD
Mean
Mdn
SD
Mean
Mdn
SD
One to 6 yrs versus 6 to 11 yrs
One to 6 yrs versus over 11 yrs
Six to 11 yrs versus over 11 yrs
Breaking peak
0.7
4.1
14.2
14.8
21.6
28.6
4.0
3.2
21.0
0.408
1.000
0.383
Propulsion peak
−8.9
11.7
47.6
13.9
7.3
19.1
3.7
6.5
12.6
0.681
0.758
0.805
First vertical peak
7.9
2.6
16.6
2.8
3.6
6.9
1.9
1.6
2.3
0.867
0.955
0.535
Second vertical peak
6.5
1.6
15.6
0.5
0.1
3.9
3.1
5.1
6.7
0.694
0.867
0.318
Minimal vertical force
0.9
−2.5
9.8
−3.2
−1.9
4.5
−0.6
−3.1
4.8
0.779
0.955
0.456
Time of breaking peak
−1.1
−6.7
21.8
−3.6
−3.0
11.1
0.2
2.2
8.8
0.758
0.758
0.710
Time of propulsion peak
−2.6
8.9
30.2
5.6
3.2
14.5
0.2
−3.1
10.5
0.681
0.758
0.620
Time of first vertical peak
−6.5
−5.4
19.2
−15.4
−16.1
15.1
7.4
3.9
18.1
0.189+
0.397
0.053
Time of second vertical peak
−1.0
−1.4
6.8
1.4
2.1
16.4
6.5
−0.8
20.3
0.613
0.867
0.902
Time of minimal vertical force
0.2
0.9
5.0
4.2
0.9
5.8
1.0
1.0
4.7
0.232+
0.867
0.535
Stance phase duration
0.5
0.7
1.9
4.2
6.4
4.2
−1.4
−0.2
6.8
0.091+
0.606
0.097+
Positive value means higher value of variable on the nonoperated limb and negative value means higher value of variable on the operated limb. Mdn: median, SD: standard deviation, + = 0.1 0.3 – small effect, and = 0.3 0.5 – medium effect and 0.5 – large effect.
