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Table 5 Cross-sectional construct validation (Baseline) (Pearson correlation coefficients)

From: Modification of the asthma quality of life questionnaire (standardised) for patients 12 years and older

  Study 1
AQLQ12+ Age FEV1% pred PEF Symptoms Night waking Rescue bd
Overall ≥ 18 yr 0.15 0.29 -0.50 -0.50 -0.35
  12–17 yr -0.11 0.13 -0.37 -0.38 -0.21
Symptoms ≥ 18 yr 0.14 0.22 -0.53 -0.54 -0.39
  12–17 yr -0.11 0.15 -0.34 -0.40 -0.23
Activities ≥ 18 yr 0.14 0.32 -0.47 -0.45 -0.29
  12–17 yr -0.13 0.15 -0.37 -0.35 -0.16
Emotions ≥ 18 yr 0.15 0.25 -0.36 -0.35 -0.28
  12–17 yr -0.10 0.05 -0.28 -0.27 -0.23
Environment ≥ 18 yr 0.07 0.24 -0.34 -0.36 -0.22
  12–17 yr -0.01 0.06 -0.25 -0.25 -0.12
  Study 2
AQLQ12+ Age FEV1% pred PEF Symptoms Night waking Rescue bd
Overall ≥ 18 yr 0.06 0.23 -0.49 -0.47 -0.35
  12–17 yr 0.03 0.37 -0.46 -0.39 -0.28
Symptoms ≥ 18 yr 0.06 0.17 -0.56 -0.54 -0.42
  12–17 yr 0.04 0.32 -0.49 -0.42 -0.32
Activities ≥ 18 yr 0.06 0.28 -0.40 0.41 -0.28
  12–17 yr 0.05 0.35 -0.42 -0.41 -0.21
Emotions ≥ 18 yr 0.06 0.18 -0.36 -0.36 -0.25
  12–17 yr -0.02 0.36 -0.32 -0.31 -0.25
Environment ≥ 18 yr 0.03 0.21 -0.34 -0.34 -0.23
  12–17 yr -0.01 0.40 -0.43 -0.36 -0.25