Minimal clinically important difference of KBILD (logit scores version)
| MCID anchor | Mean MCID (range) | ||||
| GRCQ | FVC 7%–12% | 1 SEM | ES 0.3 | ||
| KBILD Psychological | 5.3 (17.8) | 7.4 (5.6) | 5.8 | 5.8 | 6 (5–7) |
| KBILD Breathlessness and Activities | 8.3 (18.3) | 6.9 (12.0) | 6.9 | 6.1 | 7 (6–8) |
| KBILD Chest | 11.2 (19.4) | 13.7 (21.5) | 12.3 | 7.1 | 11 (7–14) |
| KBILD Total | 6.7 (13.2) | 6.1 (7.0) | 3.8 | 4.7 | 5 (4–7) |
All data are mean (SD) (apart from mean MCID (range)). Positive and negative changes in each GRCQ and FVC category are grouped together.
ES, effect size; GRCQ, Global Rating of Change Questionnaire; KBILD, King’s Brief Interstitial Lung Disease Questionnaire; MCID, minimal clinically important difference; SEM, standard error of baseline measurement.