Questionnaire | Change in score between clinic visits: stable patients (A) | Change in score between clinic visits: unstable patients (B) | A versus B | Responsiveness index | |||
Mean±sd | p-value | Mean±sd | p-value | Mean±sd | p-value | ||
ACQ all questions | −0.20±0.76 | 0.29 | −0.93±1.45 | 0.026 | 0.74±1.13 | 0.072 | 0.455 |
Symptoms alone | −0.26±0.90 | 0.24 | −1.24±1.51 | 0.007 | 0.98±1.21 | 0.027 | 0.544 |
Symptoms plus FEV1 % pred | −0.28±0.80 | 0.16 | −1.09±1.45 | 0.011 | 0.81±1.14 | 0.051 | 0.540 |
Symptoms plus SABA use | −0.17±0.85 | 0.42 | −1.03±1.50 | 0.018 | 0.87±1.18 | 0.045 | 0.450 |
FEV1: forced expiratory volume in 1 s; % pred: % predicted; SABA: short-acting β2-agonist.