A new self-administered questionnaire to monitor health-related quality of life in patients with COPD

Shin-Ping Tu, M. B. McDonell, J. A. Spertus, B. G. Steele, S. D. Fihn

Research output: Contribution to journalArticle

85 Scopus citations

Abstract

Study objective: To develop and validate a brief, computer-scannable, self-administered questionnaire to monitor health-related quality of life in patients with COPD. The Seattle Obstructive Lung Disease Questionnaire (SOLQ) consists of 29 items measuring four health dimensions: physical function, emotional function, coping skills, and treatment satisfaction. Methods: A series of studies was performed to assess reliability, validity, and responsiveness. Internal consistency was measured using a cross-sectional survey of 203 COPD patients. Reproducibility was tested over a 4-month interval among 97 patients with self-reported stable conditions. To assess construct validity, SOLQ scales were correlated with corresponding Chronic Respiratory Disease Questionnaire (CRDQ) scales, the COPD Self-Efficacy Scale (CSES), percent predicted FEV1, and 6-rain walk test. Treatment satisfaction scores of 920 subjects were correlated with a general measure of patient satisfaction. Baseline and follow-up scores of subjects were compared to assess treatment responsiveness. Results: SOLQ scales were reliable (Cronbach's α 0.79 to 0.93, and intraclass correlation coefficients 0.64 to 0.87). Change in SOLQ scores correlated with corresponding CRDQ scales: dyspnea, r=0.42; emotional burden, r=0.49; mastery, r=0.36. Coping skills correlated highly with CSES, r=0.93. Treatment satisfaction correlation was r=0.54. Significant changes occurred in all three scales postintervention. Conclusion: The SOLQ is a reliable, valid, and responsive measure of physical and emotional function, coping skills, and treatment satisfaction. Brief, self-administered, and computer scannable, it is useful in monitoring long- term outcomes among large groups of COPD patients.

Original languageEnglish (US)
Pages (from-to)614-622
Number of pages9
JournalChest
Volume112
Issue number3
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

Keywords

  • Chronic obstructive pulmonary disease
  • Functional status
  • Health-related quality of life
  • Questionnaire

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine
  • Cardiology and Cardiovascular Medicine

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