Journal article
Establishing the minimal number of items for a responsive, valid, health-related quality of life instrument
Abstract
Reducing the number of items in a health-related quality of life instrument will enhance efficiency. However, it is important to maintain measurement properties. We determined the effect of reducing items from each domain (dyspnea, fatigue, emotion and mastery) of the 20-item Chronic Respiratory Questionnaire (CRQ). Three randomized trials of respiratory rehabilitation provided data. We removed items one at a time from each domain in three …
Authors
Moran LA; Guyatt GH; Norman GR
Journal
Journal of Clinical Epidemiology, Vol. 54, No. 6, pp. 571–579
Publisher
Elsevier
Publication Date
6 2001
DOI
10.1016/s0895-4356(00)00342-5
ISSN
0895-4356