Personality dimensions in chronic fatigue syndrome and depression.
Buckley, L, MacHale, S M, Cavanagh, J T et al. · Journal of psychosomatic research · 1999 · DOI
Quick Summary
This study looked at personality traits in people with ME/CFS, people with depression, and healthy people. Researchers found that ME/CFS patients tended to be less outgoing and more anxious/worried compared to healthy people, but less anxious than those with depression. Interestingly, ME/CFS patients reported they felt less outgoing and more anxious when they were sick compared to when they were well, suggesting illness itself may change how people experience their personality.
Why It Matters
Understanding whether personality changes in ME/CFS are consequences of illness rather than causes helps counter misconceptions that psychological traits cause the condition. This distinction is crucial for appropriate treatment approaches and for validating patient experiences of how the illness affects their sense of self.
Observed Findings
CFS patients scored significantly lower on extroversion than healthy controls
CFS patients showed intermediate neuroticism scores, higher than controls but lower than MDD patients
CFS patients reported themselves as less extroverted when ill compared to when well
CFS patients rated themselves as more neurotic during illness than during wellness periods
Personality differences between CFS and healthy controls were smaller than differences between MDD and healthy controls
Inferred Conclusions
High neuroticism and low extroversion in CFS may represent a reaction to chronic illness rather than predisposing personality factors
Personality changes are potentially reversible, as patients reported different trait ratings during periods of wellness versus illness
CFS differs from depression in its personality profile, suggesting distinct underlying mechanisms
Remaining Questions
Do personality changes in ME/CFS precede illness onset or develop as a consequence of prolonged symptoms?
How do personality dimensions change longitudinally as patients improve or deteriorate?
What This Study Does Not Prove
This study cannot establish whether personality changes cause ME/CFS or result from it, since it measured traits at only one time point. The cross-sectional design means we cannot determine if low extroversion and high neuroticism preceded illness onset or developed because of chronic illness. It also does not address other potential causes of ME/CFS such as infectious agents or biological factors.
Tags
Symptom:Fatigue
Method Flag:Weak Case DefinitionSmall SampleExploratory Only
Which specific illness features (fatigue severity, symptom duration, functional impairment) most strongly correlate with personality changes?
Are there identifiable subgroups of ME/CFS patients with different personality profiles, and do these relate to different disease etiologies or prognoses?