Table 3 3D gait analysis parameters, pre- and postoperative data from the operated side
n = 65 | Pre THA | Post THA | Mean diff. post vs. pre [95%CI] |
|---|---|---|---|
Overall gait pattern | |||
Gait Deviation Index | 81 (12) | 90 (10) | 8.9 [5.7, 12.1] |
Time and distance parameters | |||
Walking speed (m/s) | 1.02 (0.2) | 1.14 (0.2) | 0.13 [0.1, 0.2] |
Time in single stance (s) | 36.2 (3.3) | 38.0 (1.7) | 1.8 [1.1, 2.5] |
Gait variables hypothesized to be associated with femoral neck anteversion | |||
Hip rotation (°) | 0.3 (6.8) | 0.3 (5.4) | 0.0 [−1.7, 1.8] |
Pelvic rotation (°) | 0.8 (3.6) | −0.5 (2.5) | −1.3 [−2.1, −0.4] |
Foot progression (°) | −10.0 (7.2) | −5.1 (6.1) | 4.9 [3.8, 6.1] |
Gait variables hypothesized to be associated with femoral and acetabular offsets | |||
Hip add mom avg. (Nmm/kg) | 350 (88) | 389 (88) | 40 [18.7, 60.5] |
Hip add mom peak 1 (Nmm/kg) | 575 (134) | 616 (122) | 40 [9.3, 71.6] |
Hip add mom peak 2 (Nmm/kg) | 543 (120) | 600 (133) | 57 [27.6, 85.5] |
Trunk obliquity (°) | −3.9 (2.4) | −3.0 (2.3) | 0.9 [0.3, 1.5] |
Pelvic obliquity (°) | 2.7 (2.7) | 2.1 (2.2) | −0.6 [−1.3, 0.1] |
Hip adduction (°) | 0.2 (3.1) | 1.4 (3.1) | 1.2 [0.2, 2.1] |