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Cognitions, behaviours and co-morbid psychiatric diagnoses in patients with chronic fatigue syndrome

Published online by Cambridge University Press:  09 May 2012

M. Cella*
Affiliation:
Institute of Psychiatry, King's College London, UK
P. D. White
Affiliation:
Center for Psychiatry, Wolfson Institute of Preventive Medicine, Barts and the London School of Medicine, Queen Mary University, London, UK
M. Sharpe
Affiliation:
Department of Psychiatry, University of Oxford, UK
T. Chalder
Affiliation:
Institute of Psychiatry, King's College London, UK
*
*Address for correspondence: M. Cella, Ph.D., Department of Psychology, Institute of Psychiatry, King's College London, De Crespigny Park, London SE5 8AF, UK. (Email: matteo.cella@kcl.ac.uk)

Abstract

Background

Specific cognitions and behaviours are hypothesized to be important in maintaining chronic fatigue syndrome (CFS). Previous research has shown that a substantial proportion of CFS patients have co-morbid anxiety and/or depression. This study aims to measure the prevalence of specific cognitions and behaviours in patients with CFS and to determine their association with co-morbid anxiety or depression disorders.

Method

A total of 640 patients meeting Oxford criteria for CFS were recruited into a treatment trial (i.e. the PACE trial). Measures analysed were: the Cognitive Behavioural Response Questionnaire, the Chalder Fatigue Scale and the Work and Social Adjustment Scale. Anxiety and depression diagnoses were from the Structured Clinical Interview for DSM-IV. Multivariate analysis of variance was used to explore the associations between cognitive-behavioural factors in patients with and without co-morbid anxiety and/or depression.

Results

Of the total sample, 54% had a diagnosis of CFS and no depression or anxiety disorder, 14% had CFS and one anxiety disorder, 14% had CFS and depressive disorder and 18% had CFS and both depression and anxiety disorders. Cognitive and behavioural factors were associated with co-morbid diagnoses; however, some of the mean differences between groups were small. Beliefs about damage and symptom focussing were more frequent in patients with anxiety disorders while embarrassment and behavioural avoidance were more common in patients with depressive disorder.

Conclusions

Cognitions and behaviours hypothesized to perpetuate CFS differed in patients with concomitant depression and anxiety. Cognitive behavioural treatments should be tailored appropriately.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 2012

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