Anchor- and distribution-based estimates of the minimal important difference (MID) for the 1-min sit-to-stand (STS) test
| Subjects n | MID of anchor | Patients with change ≥anchor MID n (%) | MID estimate¶ (95% CI) | ||
| Anchor approach# | |||||
| Feeling thermometer | 46 | 5 | 32 (70) | 3.19 (1.49–4.89) | |
| TDI | 44 | 1 | 44 (100) | 2.11 (−0.13–4.34) | |
| Distribution approaches | STAND-UP | RIMTCORE | |||
| SEM | 0.93 | ||||
| Cohen's effect size | 1.80 | 2.16 | |||
| Empirical rule effect size | 1.99 | 2.07 | |||
TDI: Transition Dyspnoea Index; SEM: standard error of measurement. #: measures were considered as anchors when the change score correlation with the 1-min STS test was ≥0.3; ¶: MID estimate= α+βanchor×anchor MID.