Evaluation of the Intermittent Exotropia Questionnaire using Rasch analysis.
Publication/Presentation Date
4-1-2015
Abstract
IMPORTANCE: The Intermittent Exotropia Questionnaire (IXTQ) is a patient, proxy, and parental report of quality of life specific to children with intermittent exotropia. We refine the IXTQ using Rasch analysis to improve reliability and validity.
OBSERVATION: Rasch analysis was performed on responses of 575 patients with intermittent exotropia enrolled from May 15, 2008, through July 24, 2013, and their parents from each of the 4 IXTQ health-related quality-of-life questionnaires (child 5 through 7 years of age and child 8 through 17 years of age, proxy, and parent questionnaires). Questionnaire performance and structure were confirmed in a separate cohort of 379 patients with intermittent exotropia. One item was removed from the 12-item child and proxy questionnaires, and response options in the 8- to 17-year-old child IXTQ and proxy IXTQ were combined into 3 response options for both questionnaires. Targeting was relatively poor for the child and proxy questionnaires. For the parent questionnaire, 3 subscales (psychosocial, function, and surgery) were evident. One item was removed from the psychosocial subscale. Resulting subscales had appropriate targeting.
CONCLUSIONS AND RELEVANCE: The Rasch-revised IXTQ may be a useful instrument for determining how intermittent exotropia affects health-related quality of life of children with intermittent exotropia and their parents, particularly for cohort studies.
Volume
133
Issue
4
First Page
461
Last Page
465
ISSN
2168-6173
Published In/Presented At
Leske, D. A., Holmes, J. M., Melia, B. M., & Pediatric Eye Disease Investigator Group (2015). Evaluation of the Intermittent Exotropia Questionnaire using Rasch analysis. JAMA ophthalmology, 133(4), 461–465. https://doi.org/10.1001/jamaophthalmol.2014.5622
Disciplines
Medicine and Health Sciences | Pediatrics
PubMedID
25634146
Department(s)
Department of Pediatrics
Document Type
Article