Table 6 Longitudinal construct validity (Baseline – End of study) (Pearson correlation coefficients)
Study 1 | ||||||
|---|---|---|---|---|---|---|
AQLQ12+ | Age | FEV1% pred | PEF | Asthma symptoms | Night-time awakening | Rescue medication use |
Overall | ≥ 18 yr | 0.3 | 0.33 | -0.43 | -0.42 | -0.39 |
12–17 yr | 0.06 | 0.29 | -0.33 | -0.2 | -0.24 | |
Symptoms | ≥ 18 yr | 0.32 | 0.34 | -0.46 | -0.46 | -0.43 |
12–17 yr | 0.03 | 0.3 | -0.33 | -0.26 | -0.25 | |
Activity limitation | ≥ 18 yr | 0.27 | 0.28 | -0.39 | -0.37 | -0.33 |
12–17 yr | 0.08 | 0.26 | -0.33 | -0.18 | -0.21 | |
Emotional function | ≥ 18 yr | 0.25 | 0.29 | -0.3 | -0.31 | -0.33 |
12–17 yr | -0.06 | 0.12 | -0.22 | -0.11 | -0.2 | |
Environmental stimuli | ≥ 18 yr | 0.16 | 0.19 | -0.25 | -0.2 | -0.2 |
12–17 yr | 0.19 | 0.3 | -0.21 | 0 | -0.16 | |
Study 2 | ||||||
AQLQ12+ | Age | FEV1% pred | PEF | Asthma symptoms | Night-time awakening | Rescue medication use |
Overall | ≥ 18 yr | 0.21 | 0.41 | -0.51 | -0.41 | -0.37 |
12–17 yr | 0.23 | 0.24 | -0.45 | -0.3 | -0.2 | |
Symptoms | ≥ 18 yr | 0.23 | 0.4 | -0.56 | -0.47 | -0.43 |
12–17 yr | 0.26 | 0.29 | -0.47 | -0.31 | -0.24 | |
Activity limitation | ≥ 18 yr | 0.17 | 0.36 | -0.43 | -0.33 | -0.3 |
12–17 yr | 0.23 | 0.15 | -0.44 | -0.28 | -0.1 | |
Emotional function | ≥ 18 yr | 0.14 | 0.33 | -0.4 | -0.28 | -0.27 |
12–17 yr | 0.1 | 0.17 | -0.21 | -0.22 | -0.23 | |
Environmental stimuli | ≥ 18 yr | 0.17 | 0.36 | -0.32 | -0.28 | -0.2 |
12–17 yr | 0.16 | 0.23 | -0.48 | -0.22 | -0.15 | |