Table 2.
Functional performance classified by tertile of knee extensor torque and muscle quality.
| T1 (n = 42) | T2 (n = 43) | T3 (n = 43) | p | |
|---|---|---|---|---|
| Mean ± SD or median (IQR) | Mean ± SD or median (IQR) | Mean ± SD or median (IQR) | ||
| Knee extensor torque (N m/kg) | ||||
| Gait speed (m/s)a | 2.6 ± 0.5 | 2.3 ± 0.4 | 2.1 ± 0.4 | <0.001 |
| 95% CI | 2.5–2.8 | 2.2–2.4 | 1.9–2.2 | |
| 5 Chair repetitions (s)b | 8.1 ± 1.8 | 8.3 (2.1) | 9.4 ± 2.3 | 0.006 |
| 95% CI | 7.5–8.6 | 7.6–8.7 | 8.8–10.2 | |
| 30 s Chair repetitions (n)b,* | 19.0 ± 4.6 | 16.8 ± 3.3 | 15.6 ± 3.6 | 0.020 |
| 95% CI | 17.0–21.0 | 15.4–18.2 | 13.8–17.4 | |
| Muscle quality (N m/kg) | ||||
| Gait speed (m/s)c | 2.4 (0.7) | 2.4 ± 0.4 | 2.1 ± 0.2 | 0.001 |
| 95% CI | 2.3–2.7 | 2.2–2.5 | 2.0–2.3 | |
| 5 Chair repetitions (s)c | 8.0 (2.4) | 8.2 ± 1.7 | 9.6 ± 2.2 | 0.003 |
| 95% CI | 7.5–8.5 | 7.7–8.7 | 8.9–10.2 | |
| 30 s Chair repetitions (n)b,* | 18.3 ± 4.8 | 17.8 ± 3.6 | 15.2 ± 3.2 | 0.027 |
| 95% CI | 16.4–20.3 | 16.2–19.3 | 13.7–16.7 | |
Values are displayed as mean ± SD or median (IQR) and 95% or Boostrap 95% CI. p = significance value for one-way ANOVA or Kruskall Wallis test.
*
T1 (n = 25); T2 (n = 23); T3 = (n = 20).
Post hoc analysis: a = differences between T1, T2 and T3, p = <0.05; b = difference between T1 and T3, p = <0.05; c = T1 and T2 different to T3.