Development and validity testing of an IPF-specific version of the St George's Respiratory Questionnaire.

ABSTRACT:

Rationale

The St George's Respiratory Questionnaire (SGRQ) is often applied to assess health-related quality of life in patients with idiopathic pulmonary fibrosis (IPF). Some SGRQ items will inevitably have weaker measurement properties than others when applied to this population. This study was conducted to develop an IPF-specific version of the SGRQ.

Methods

Data from a recently completed trial that enrolled subjects with IPF (n=158) who completed the SGRQ and other measures were analysed at baseline and 6 months. There were four phases to the study: (1) removing items with missing responses and using Rasch analysis on retained items to identify fit and refine item response categories; (2) development of a new scoring scheme; (3) testing agreement between original and rev

SUBMITTER: Yorke J 

PROVIDER: S-EPMC3697105 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature