Table 2.
Actual everyday physical activity (objective) before surgery (t0) and 3 months (t3) and 6 months (t6) after surgery
| Variables of physical activity | Total group | Hip group | Knee group | p Value delta scores t3 − t0/t6 − t0 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| t0 (n = 80) | t3 (n = 77) | t6 (n = 77) | t0 (n = 36) | t3 (n = 36) | t6 (n = 35) | t0 (n = 44) | t3 (n = 41) | t6 (n = 42) | ||
| Movement-related activity (percent of 24 hours) | 8.4 ± 3.9 | 9.1 ± 4.0 (0.07) | 9.1 ± 3.9 (0.03) | 8.7 ± 4.0 | 9.1 ± 3.9 (0.22) | 9.2 ± 3.7 (0.26) | 8.1 ± 3.8 | 9.0 ± 4.1 (0.18) | 9.1 ± 4.0 (0.06) | 0.67/0.48 |
| Walking (percent of 24 hours) | 6.1 ± 2.8 | 6.4 ± 3.0 (0.41) | 6.6 ± 2.9 (0.06) | 6.3 ± 3.0 | 6.8 ± 3.0 (0.12) | 6.9 ± 2.8 (0.16) | 5.9 ± 2.7 | 6.0 ± 2.9 (0.91) | 6.4 ± 3.0 (0.21) | 0.28/0.90 |
| Upright (percent of 24 hours) | 19.8 ± 7.1 | 19.5 ± 6.1 (0.57) | 20.5 ± 6.2 (0.35) | 20.7 ± 5.9 | 20.5 ± 6.4 (0.86) | 21.4 ± 6.3 (0.49) | 19.1 ± 7.9 | 18.7 ± 5.8 (0.58) | 19.8 ± 6.1 (0.53) | 0.74/0.99 |
| STS movements (number per 24 hours) | 49.6 ± 14.1 | 52.1 ± 15.2 (0.18) | 54.4 ± 17.7 (< 0.01) | 53.7 ± 13.8 | 55.9 ± 15.2 (0.40) | 58.4 ± 19.2 (0.08) | 46.2 ± 13.7 | 48.7 ± 14.6 (0.28) | 51.0 ± 15.7 (0.06) | 0.98/0.86 |
| Motility during walking (g) | 0.142 ± 0.026 | 0.144 ± 0.030 (0.49) | 0.145 ± 0.027 (0.15) | 0.145 ± 0.029 | 0.150 ± 0.034 (0.22) | 0.149 ± 0.022 (0.08) | 0.139 ± 0.023 | 0.140 ± 0.027 (0.77) | 0.141 ± 0.030 (0.69) | 0.25/0.33 |
Values are mean ± standard deviation; movement-related activity (primary outcome) includes walking, cycling, and general movement; upright comprises standing and walking; STS movements = sit-to-stand movements, motility during walking represents walking speed (1 g = 9.81 m/s2); p value delta scores, significance for differences in changes between THA and TKA groups in parameters from t3 to t0 and t6 to t0.