ArticleQuality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation2014
Use of factor analysis models to evaluate measurement invariance property of the Asthma Control Questionnaire (ACQ).
Article in Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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4 authors.
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Abstract
purposesTo demonstrate the assessment of measurement invariance property in a health status instrument and to increase the awareness of its importance, we evaluate the measurement invariance of the Asthma Control Questionnaire (ACQ) across age and gender subgroups.
methodsData are obtained from children 7-12 years of age at entry into a randomized trial, which evaluates the effect of a telephone coaching program on improving asthma outcome. Multi-group confirmatory factor analysis is used to assess the comparability of factor loadings and intercepts across age and gender subgroups. Since age is a continuous variable, two different categorizations (7-10 vs 11-12 and 7-9 vs 10-12) are analyzed.
resultsThe factor loadings and intercepts of all six items in ACQ are comparable across gender subgroups. Although the factor loadings are comparable across age 7-10 and 11-12 subgroups, one intercept is statistically but not practically different. For age 7-9 versus 10-12 subgroup comparison, the factor loadings are not comparable.
conclusionIn children, the ACQ can be used to compare asthma control construct between boys and girls and between age 7-10 and 11-12 subgroups. Measurement invariance is an important property that should be examined when the latent construct(s) are compared across different subgroups.
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