Table 4. Peak torque per body weight (Nm/kg) (mean ± standard deviation) on the involved and the uninvolved side in the THA group (n = 21), and in the healthy group (n = 21).
| Variable | The THA group |
The healthy group | ||||||
|---|---|---|---|---|---|---|---|---|
| Side | before | 4 weeks | 6 months | |||||
| Hip flexors | involved | 0.83 ± 0.21** | (66%) | 0.83 ± 0.26** | (67%) | 1.12 ± 0.39## | (90%) | 1.25 ± 0.25 |
| uninvolved | 1.14 ± 0.32 | (91%) | 1.21 ± 0.25 | (96%) | 1.43 ± 0.53## | (110%) | ||
| Hip extensors | involved | 0.80 ± 0.40** | (55%) | 0.82 ± 0.35** | (56%) | 1.17 ± 0.41##* | (79%) | 1.47 ± 0.48 |
| uninvolved | 1.18 ± 0.43* | (81%) | 1.27 ± 0.51 | (87%) | 1.43 ± 0.53## | (97%) | ||
| Hip abductors | involved | 0.72 ± 0.15** | (55%) | 0.70 ± 0.25** | (53%) | 0.99 ± 0.22##** | (75%) | 1.32 ± 0.26 |
| uninvolved | 0.95 ± 0.18** | (72%) | 0.92 ± 0.20** | (70%) | 1.10 ± 0.26##** | (83%) | ||
| Knee extensors | involved | 1.07 ± 0.37** | (57%) | 0.68 ± 0.31##** | (36%) | 1.39 ± 0.49##** | (75%) | 1.86 ± 0.48 |
| uninvolved | 1.51± 0.56* | (81%) | 1.54 ± 0.50* | (83%) | 1.86 ± 0.55## | (100%) | ||
| Knee flexors | involved | 0.57 ± 0.20** | (61%) | 0.66 ± 0.23** | (70%) | 0.84 ± 0.20## | (90%) | 0.94 ± 0.21 |
| uninvolved | 0.69 ± 0.24** | (74%) | 0.71 ± 0.22** | (76%) | 0.83 ± 0.22## | (88%) | ||
THA = total hip arthroplasty
## p < 0.01, Significant difference compared with before surgery
* p < 0.05,** p < 0.01, Significant difference compared with the healthy group
Percentage indicates ratio between THA and healthy; this was calculated using the formula: % = [(mean value in the THA group) / (mean value in the healthy group)] × 100