Background
Methods
Participants
Procedures
Statistical analysis
Results
Characteristic | Unilateral hip OA n = 12 | Bilateral hip OA n = 7 | Hip OA n = 19 | Control n = 23 | ||||
---|---|---|---|---|---|---|---|---|
Age (years) | 62.9 ± 10.0 | 63.0 ± 6.4 | 62.8 ± 8.6 | 58.2 ± 8.6 | ||||
Males, n (%) | 3 (25%) | 3 (42%) | 6 (32%) | 8 (35%) | ||||
Height (m) | 1.65 ± 0.09 | 1.69 ± 0.14 | 1.66 ± 0.10 | 1.69 ± 0.08 | ||||
Body mass (kg) | 77.3 ± 14.0 | 77.2 ± 15.0 | 77.2 ± 14.0 | 69.9 ± 10.0 | ||||
Body mass index (kg/m2) | 28.2 ± 3.5 | 27.1 ± 3.5 | 27.8 ± 3.5* | 24.4 ± 3.0 | ||||
Harris Hip Score (HHS)ab | 69.9 ± 12.9 | 66.2 ± 13.5 | 68.6 ± 12.9 | 99.9 ± 0.7 | ||||
Affected
|
Contralateral
|
Most affected
|
Less affected
|
(Most) affected
|
Contralateral/Less affected
|
Left
|
Right
| |
Joint space width (mm) | 2.3 ± 1.1 | 3.5 ± 0.7 | 2.9 ± 0.5 | 3.0 ± 0.5 | 2.5 ± 1.0* | 3.3 ± 0.7* | 4.0 ± 0.5 | 3.9 ± 0.6 |
Kellgren-Lawrence grade | 2, n = 4 3, n = 8 | 0, n = 4 1, n = 8 | 2, n = 4 3, n = 3 | 2, n = 5 3, n = 2 | 2, n = 8 3, n = 11 | 0, n = 4 1, n = 8 2, n = 5 3, n = 2 | 0, n = 12 1, n = 11 | 0, n = 18 1, n = 5 |
Lower limb strength
Hip OA (mean ± SD) | Control (mean ± SD) | F, p | Mean difference (mean ± SD) | 95% CI of mean difference | Effect size | |
---|---|---|---|---|---|---|
Strength (Nm/kg)
| ||||||
Knee flexors | 0.977 ± 0.292 | 1.255 ± 0.281 | 9.579, 0.004* | 0.278 ± 0.392 | 0.096, 0.460 | 0.71 |
Knee extensors | 1.286 ± 0.344 | 1.664 ± 0.328 | 12.450, 0.001* | 0.378 ± 0.462 | 0.164, 0.593 | 0.82 |
Hip flexors | 0.898 ± 0.331 | 1.216 ± 0.314 | 9.866, 0.003* | 0.319 ± 0.440 | 0.113, 0.524 | 0.73 |
Hip extensors | 0.908 ± 0.292 | 1.216 ± 0.281 | 11.652, 0.02* | 0.307 ± 0.392 | 0.125, 0.490 | 0.78 |
Hip abductors | 0.662 ± 0.209 | 0.905 ± 202 | 14.34, 0.001* | 0.244 ± 0.279 | 0.113, 0.374 | 0.87 |
Hip adductors | 0.639 ± 0.323 | 0.834 ± 0.314 | 3.794, 0.06 | 0.194 ± 0.436 | −0.008, 0.397 | 0.44 |
Volume (cm
3
/kg)
| ||||||
TFL | 0.909 ± 0.324 | 0.816 ± 0.300 | 0.986, 0.327 | 0.094 ± 0.410 | −0.285, 0.098 | 0.23 |
GMax | 9.560 ± 2.336 | 11.119 ± 2.153 | 5.268, 0.028* | 1.558 ± 2.995 | 0.182, 2.934 | 0.52 |
GMed | 4.031 ± 0.722 | 4.241 ± 0.666 | 1.001,0.324 | 0.209 ± 0.911 | −0.216, 0.634 | 0.23 |
GMin | 1.006 ± 0.380 | 1.525 ± 0.352 | 22.048, < 0.001* | 0.520 ± 0.484 | 0.295, 0.744 | 1.07 |
Add | 10.827 ± 2.111 | 12.489 ± 1.947 | 7.380,0.01* | 1.662 ± 2.668 | 0.420, 2.940 | 0.62 |
Hams | 7.444 ± 1.548 | 9.117 ± 1.426 | 13.899, 0.001* | 1.673 ± 1.957 | 0.762, 2.583 | 0.85 |
Quad | 16.114 ± 4.512 | 20.769 ± 4.160 | 12.666, 0.001* | 4.655 ± 5.701 | 2.001, 7.311 | 0.82 |