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CFS-APQ : Abstract By Nijs J, Vaes P, De Meirleir K

Abstract: The Chronic Fatigue Syndrome Activities and Participation Questionnaire (CFS-APQ): an overview

September 2005

Occup Ther Int. 2005;12(2):107-21

Nijs J, Vaes P, De Meirleir K.

Department of Physiology, Faculty of Physical Education and Physiotherapy, Vrije Universiteit Brussel (VUB), Brussels, Belgium.

Chronic fatigue syndrome (CFS) is characterized by severe fatigue and a reduction in activity levels. The purpose of this study was to provide an overview of design, reliability, and validity of the CFS Activities and Participation Questionnaire (CFS-APQ).

The CFS-APQ was constructed based on a retrospective analysis of the Karnofsky Performance Status Questionnaire and the Activities of Daily Living Questionnaire (n = 141).

In a reliability study of 34 participants the test-retest reliability coefficient of the CFS-APQ was 0.95.

In two different studies, the Cronbach alpha coefficient for internal consistency varied between 0.87 (n = 88) and 0.94 (n = 47).

The CFS-APQ was administered to 47 patients who listed 183 activities that had become difficult due to their chronic symptoms, and 157 (85.8%) answers matched the content of the CFS-APQ.

The outcome of a cross-sectional study (n = 88) studying the correlations between the Medical Outcomes Short Form 36 Health Status Survey subscale scores and the CFS-APQ supported the validity of the CFS-APQ.

The CFS-APQ scores correlated with a behavioural assessment of the patients' performance of activities encompassed by the questionnaire (r = 0.29-0.55; n = 63), and correlated with exercise capacity parameters (r = 0.26-0.39; n = 77) obtained during a maximal exercise capacity stress test.

Finally, the CFS-APQ correlated with visual analogue scales for pain (r = 0.51) and fatigue (r = 0.50; n = 47).

It is concluded that the CFS-APQ generates reliable and valid data, and can be used as a clinical measure of disease severity in patients with CFS. Future studies should aim at examining the sensitivity of the CFS-APQ.

Source: Occup Ther Int. 2005;12(2):107-21 - PMID: 16136868 [PubMed - in process]

Category: CFS-APQ , Chronic Fatigue Syndrome , CFS Activities and Participation Questionnaire , Nijs , Vaes, De Meirleir

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