Table 3.
Distribution-based estimates of the minimal important difference (MID) in isokinetic quadriceps function for male and female patients with COPD.
| Males (n = 474) |
Females (n = 513) |
|||||||
|---|---|---|---|---|---|---|---|---|
| Method | SEM | Empirical rule effect size | Cohen's effect size | MID estimates | SEM | Empirical rule effect size | Cohen's effect size | MID estimates |
| Peak torque (Nm) | 6 | 6 | 7 | 6–7 | 4 | 4 | 5 | 4–5 |
| Peak torque (% change) | NA | 8 | 8 | 8 | NA | 8 | 8 | 8 |
| Total work (J) | 97 | 129 | 135 | 97–135 | 62 | 95 | 99 | 62–99 |
| Total work (% change) | NA | 24 | 25 | 24–25 | NA | 13 | 14 | 13–14 |
Abbreviations: COPD, chronic obstructive pulmonary disease; NA, not applicable; SEM, standard error of measurement.