Relative contributions of psychiatric symptoms and neuropsychological functioning to quality of life in first-episode psychosis

Signy Wegener, Marie Antoinette Redoblado-Hodge*, Sara Lucas, Dianne Fitzgerald, Anthony Harris, John Brennan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Citations (Scopus)

Abstract

Objective: To report on the relationship between quality of life (QOL), psychiatric symptoms and neuropsychological functioning in a sample of young people who have experienced a first episode of psychosis 2-3 years following initial presentation. Method: Fifty-one participants aged 15-27 years old completed the short form of the World Health Organization Quality of Life scale (WHOQOL-Brèf), a self-report instrument assessing physical, psychological, social and environmental aspects of QOL. A comprehensive neuropsychological battery was administered. Measures of psychiatric symptoms including depression (as assessed by the Calgary Depression Scale), positive, negative and general psychopathology (as assessed by the Positive and Negative Syndrome Scale) were obtained. Results: Multiple regression analyses were used to evaluate the ability of neuropsychological measures and psychiatric symptoms to predict QOL. When neuropsychological variables were considered on their own, cognitive flexibility, verbal fluency, verbal ability and sustained attention explained up to 28% of the variance in the four domains of QOL. However, in the presence of psychiatric symptoms, neuropsychological variables were no longer significant predictors for physical and psychological QOL; depression, general psychopathology and negative symptoms together explained up to 43% of the variance in QOL, with neuropsychological variables remaining significant for social and environmental QOL. Conclusions: In young people with their first episode of psychosis, QOL is more strongly related to levels of psychopathology, particularly depression, than neuropsychological deficits. This finding replicates previous studies in chronic schizophrenia that have suggested QOL is more strongly related to levels of psychopathology than the presence of neuropsychological deficits.

Original languageEnglish
Pages (from-to)487-492
Number of pages6
JournalAustralian and New Zealand Journal of Psychiatry
Volume39
Issue number6
DOIs
Publication statusPublished - Jun 2005
Externally publishedYes

Keywords

  • Cognition
  • Depression
  • First-episode psychosis
  • Psychopathology
  • Quality of life

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