title: New aspects of psychiatric morbidity in idiopathic environmental intolerances.
abstract: OBJECTIVE
  To understand idiopathic environmental intolerances (IEI)-formerly multiple chemical sensitivities (MCS)-it is helpful to outline its characteristic psychiatric morbidity.
  
  
  METHODS
  We applied a standardized interview according to the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (SCID) to 305 environmental patients with and without IEI.
  
  
  RESULTS
  Somatoform, affective and anxiety disorders were the most frequent diagnoses but only slightly differed between patients with or without IEI. In both groups, current substance-related disorders were rare. We found a clearly higher prevalence of psychotic, especially current delusional disorders, in IEI.
  
  
  CONCLUSIONS
  Somatization, depression, and anxiety are frequent in IEI but nonspecific. Psychotic disorders are more common in IEI than in other types of environmental illness. It appears worthwhile to study personality and cognitive style to explain the pivotal features of IEI.
authors.affiliation: Department of Psychiatry and Psychotherapy, Technical University Munich, Munich, Germany. c.hausteiner@lrz.tum.de
authors.forename: Constanze
authors.initials: C
authors.lastname: Hausteiner
authors.forename: Anne
authors.initials: A
authors.lastname: Mergeay
authors.forename: Susanne
authors.initials: S
authors.lastname: Bornschein
authors.forename: Thomas
authors.initials: T
authors.lastname: Zilker
authors.forename: Hans
authors.initials: H
authors.lastname: Förstl
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D015897:Comorbidity; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008875:Middle Aged; D018777:Multiple Chemical Sensitivity / Q000453:epidemiology* / Q000523:psychology*; D015995:Prevalence; D011618:Psychotic Disorders / Q000453:epidemiology; D017678:Sex Distribution; D019966:Substance-Related Disorders / Q000453:epidemiology