Impact of severity and type of depression on quality of life in cases identified in the community

R. Nuevo, C. Leighton, G. Dunn, C. Dowrick, V. Lehtinen, O. S. Dalgard, P. Casey, J. L. Vazquez-Barquero, J. L. Ayuso-Mateos*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

10 Citations (Scopus)

Abstract

Background. The impact of different levels of depression severity on quality of life (QoL) is not well studied, particularly regarding ICD-10 criteria. The ICD classification of depressive episodes in three levels of severity is also controversial and the less severe category, mild, has been considered as unnecessary and not clearly distinguishable from non-clinical states. The present work aimed to test the relationship between depression severity according to ICD-10 criteria and several dimensions of functioning as assessed by Medical Outcome Study (MOS) 36-item Short Form general health survey (SF-36) at the population level.

Method. A sample of 551 participants from the second phase of the Outcome of Depression International Network (ODIN) study (228 controls without depression and 313 persons fulfilling ICD criteria for depressive episode) was selected for a further assessment of several variables, including QoL related to physical and mental health as measured with the SF-36.

Results. Statistically significant differences between controls and the depression group were found in both physical and mental markers of health, regardless of the level of depression severity; however, there were very few differences in QoL between levels of depression as defined by ICD-10. Regardless of the presence of depression, disability, widowed status, being a woman and older age were associated with worse QoL in a structural equation analysis with covariates. Likewise, there were no differences according to the type of depression (single-episode versus recurrent).

Conclusions. These results cast doubt on the adequacy of the current ICD classification of depression in three levels of severity.

Original languageEnglish
Pages (from-to)2069-2077
Number of pages9
JournalPsychological Medicine
Volume40
Issue number12
DOIs
Publication statusPublished - Dec 2010

Keywords

  • Depressive episode
  • disability
  • quality of life
  • severity
  • SF-36
  • MENTAL-HEALTH SURVEY
  • SUBSYNDROMAL DEPRESSION
  • PSYCHIATRIC-DISORDER
  • GENERAL-POPULATION
  • MOOD DISORDERS
  • PREVALENCE
  • SUBTYPES
  • VALIDITY
  • NEMESIS
  • EPISODE

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