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Development of the ATAQ-IPF: a tool to assess quality of life in IPF

2010; BioMed Central; Volume: 8; Issue: 1 Linguagem: Inglês

10.1186/1477-7525-8-77

1477-7525

Jeffrey J. Swigris, Sandra R. Wilson, Kathy E. Green, David Sprunger, Kevin K. Brown, Frederick S. Wamboldt,

Respiratory and Cough-Related Research

There is no disease-specific instrument to assess health-related quality of life (HRQL) in patients with idiopathic pulmonary fibrosis (IPF). Patients' perspectives were collected to develop domains and items for an IPF-specific HRQL instrument. We used item variance and Rasch analysis to construct the ATAQ-IPF (A Tool to Assess Quality of life in IPF). The ATAQ-IPF version 1 is composed of 74 items comprising 13 domains. All items fit the Rasch model. Domains and the total instrument possess acceptable psychometric characteristics for a multidimensional questionnaire. The pattern of correlations between ATAQ-IPF scores and physiologic variables known to be important in IPF, along with significant differences in ATAQ-IPF scores between subjects using versus those not using supplemental oxygen, support its validity. Patient-centered and careful statistical methodologies were used to construct the ATAQ-IPF version 1, an IPF-specific HRQL instrument. Simple summation scoring is used to derive individual domain scores as well as a total score. Results support the validity of the ATAQ-IPF, and future studies will build on that validity.