Table 4– Comparison of the original Asthma Control Questionnaire (ACQ) and the shortened versions (0 = well controlled; 6 = extremely poorly controlled)
QuestionnaireScore at baselineChange score between baseline and 4 weeksConcordance between ACQ and short versions at baseline (ICC)Difference between ACQ and short versionsDifference between change in ACQ and change in short versions between baseline and 4 weeks
ACQ all questions1.76±0.71-0.53±1.17
Symptoms alone1.88±0.81-0.70±1.290.930.12±0.260.0100.17±0.340.006
Symptoms plus FEV1 % pred1.83±0.74-0.65±1.200.980.07±0.11<0.0010.11±0.17<0.001
Symptoms plus SABA use1.79±0.77−0.56±1.250.960.03±0.210.380.03±0.230.49
  • Data are presented as mean±sd, unless otherwise stated. ICC: intraclass correlation coefficient; FEV1: forced expiratory volume in 1 s; % pred: % predicted; SABA: short-acting β2-agonist.