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To date, there is limited psychometric evidence on the Asthma Quality of Life Questionnaire (AQLQ12 +) among populations that include adolescents and adults.
To provide evidence of the psychometric properties of the AQLQ12+ as a measure of asthma-specific quality of life (QOL) in patients with persistent asthma treated with a combination of inhaled glucocorticoid and long-acting beta2-agonist, as well as explore the predictors of at least a minimally important AQLQ12+ improvement.
The psychometric properties of the AQLQ12+ were assessed through post hoc analysis of two large (n = 740 and 778) Phase III, randomized, double-blinded, placebo-controlled efficacy studies of mometasone furoate/formoterol fumarate (MF/F) combination compared with monotherapy in subjects with persistent asthma previously treated with either low-dose or medium-dose inhaled glucocorticoids.
With 15% and 8% participation from 12- to 17-year olds, blinded trial data demonstrated excellent reproducibility (ICC range: 0.76–0.85) and moderate-to-strong construct validity with other measures of asthma health at baseline and over time for the AQLQ12 +. A greater percentage of the MF/F treatment group (44%) achieved an important change at 26 weeks on the AQLQ12+ compared with formoterol fumarate (F, 23%) and placebo (18%) treatment groups in the low-dose study (P < 0.001) and the medium-dose study (50% (MF/F) versus 34% (F) and 23% (placebo); P < 0.001). Pre-randomization nighttime awakenings and rescue medications use were significant predictors of AQLQ12+ improvement.
These findings provide strong support for the measurement properties of the AQLQ12+ among patients with persistent asthma and confidence in the AQLQ12+ improvements demonstrated by the MF/F treatment group.
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- Validation of the AQLQ12+ among adolescents and adults with persistent asthma
Kathleen W. Wyrwich
Andrea M. Ireland
Davis F. Gates Jr.
- Springer Netherlands