Illness perception and symptom components in chronic fatigue syndrome

…experienced specific symptoms. A factor analysis of the symptom data yielded four components: emotional distress; fatigue; somatic symptoms; and cognitive difficulty. Emotional disturbance is a common feature of the disorder

Biopsychosocial aspects of chronic fatigue syndrome (myalgic encephalomyelitis)

…specific psychiatric diagnoses, derived from a comprehensive diagnostic interview, occurred less frequently. One questionnaire (Montgomery-Asberg depression rating scale) found emotional distress in 93%, but the diagnostic instrument (Present State Examination)…