Table 4 Minimal clinical important differences (MCID) of TRACK according to anchor-based and distribution-based approaches
From: Test for Respiratory and Asthma Control in Kids (TRACK): validation of the Portuguese version
| Mean difference in TRACK scores | Effect size | |
|---|---|---|
| Medical opinion | ||
| Well vs partially controlled | 15.6 | 0.69 |
| Partially vs not controlled | 24.6 | 1.1 |
| GINA classification | ||
| Well vs partially controlled | 15.7 | 0.69 |
| Partially vs not controlled | 20.6 | 0.91 |
| ED visit in the last month | ||
| Yes vs no | 20.7 | 0.92 |
| Medical opinion at follow-up (N = 195) | ||
| Better/worse (1 level) | 9.3 | 0.41 |
| Baseline (N = 299) – 0.5 SD | 11.3 | – |
| Follow-up (N = 195) – 0.5 SD | 10.7 | – |
| Baseline (N = 299) – 1 SEM | 12.4 | – |
| Follow-up (N = 195) – 1 SEM | 11.7 | – |