title: Why do alexithymic features appear to be stable? A 12-month follow-up study of a general population.
abstract: BACKGROUND
  This 12-month follow-up study investigated the prevalence of alexithymia and its relationship with depression in a sample of the general population from Eastern Finland (n = 1,584).
  
  
  METHODS
  Alexithymia was assessed using the 20-item version of the Toronto Alexithymia Scale (TAS) and depression using the 21-item Beck Depression Inventory (BDI).
  
  
  RESULTS
  The prevalence of alexithymia in each study phase was similar (baseline: 9.7%; follow-up: 10.1%). Mean values of BDI, TAS-20 and subfactors of the TAS-20 also remained unchanged between the study phases. However, by using the original cutoff points, we found that a proportion of the subjects were in a different TAS-20 category on follow-up than at baseline. The mean values of BDI had not changed in those subjects who had similar alexithymia status in both phases, but increased or decreased in parallel with the change in TAS-20 score among all other subjects.
  
  
  CONCLUSIONS
  Our findings indicate that it is important to use a variety of viewpoints when studying changes in alexithymia status. Alexithymia appears to be a stable trait based on the similarity of the mean TAS-20 scores in separate study phases. However, when focusing on the changes in alexithymia status at the individual level, alexithymic features also appear to be state dependent and strongly related to depressive symptoms.
authors.affiliation: Department of Psychiatry, Research and Development Unit, Kuopio University Hospital, Kuopio, Finland. kirsi.honkalampi@kuh.fi
authors.forename: K
authors.initials: K
authors.lastname: Honkalampi
authors.forename: H
authors.initials: H
authors.lastname: Koivumaa-Honkanen
authors.forename: A
authors.initials: A
authors.lastname: Tanskanen
authors.forename: J
authors.initials: J
authors.lastname: Hintikka
authors.forename: J
authors.initials: J
authors.lastname: Lehtonen
authors.forename: H
authors.initials: H
authors.lastname: Viinamäki
mesh_terms: D000342:Affective Symptoms / Q000523:psychology*; D005260:Female; D005387:Finland; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010555:Personality Inventory; D015995:Prevalence; D015203:Reproducibility of Results