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Cortisol output in adolescents with chronic fatigue syndrome: Pilot study on the comparison with healthy adolescents and change after cognitive behavioural guided self-help treatment

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)409-414
Number of pages6
JournalJournal of Psychosomatic Research
Volume77
Issue number5
DOIs
StatePublished - Nov 2014

Documents

  • Rimes et al. Cortisol output in adolescents with CFS

    Rimes_in_press_Cortisol_output_in_adolescents_with_CFS.pdf, 209 KB, application/pdf

    27/10/2014

    Accepted author manuscript

    NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Psychosomatic Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication.

King's Authors

Abstract

Objective
This study examined cortisol in adolescents with chronic fatigue syndrome (CFS) compared to healthy adolescents and changes in cortisol after cognitive behavioural guided self-help treatment. Exploratory analyses investigated the association between cortisol output and psychological variables.

Methods
Salivary cortisol was measured upon awakening, at 15, 30, 45 and 60 min afterwards and at 12 noon, 4:00 p.m. and 8:00 p.m., in adolescents with CFS and healthy controls (HC). Groups were matched for age, gender, menarche status, menstrual cycle and awakening time. Twenty-four adolescents with CFS provided saliva samples six months after treatment. The main outcome measure was total salivary output over the day, calculated by area under the curve (AUC). The salivary awakening response was also assessed.

Results
Cortisol output over the day was significantly lower in the CFS group (n = 46) than in healthy controls (n = 33). Within the CFS group, lower daily cortisol output was associated with higher self-reported perfectionist striving and prosocial behaviour. There were no significant group differences in the awakening response (n = 47 CFS versus n = 34 HC). After treatment, adolescents with CFS (n = 21) showed a significant increase in daily cortisol output, up to normal levels.

Conclusion
The reduced daily cortisol output in adolescents with CFS is in line with adult findings. Associations between reduced cortisol output and two psychological variables—perfectionism and prosocial behaviour—are consistent with cognitive behavioural models of chronic fatigue syndrome. The mild hypocortisolism is reversible; cortisol output had returned to healthy adolescent levels by six months after cognitive behavioural guided self-help treatment.

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