The relationship of neuropsychological test performance with the PANSS in antipsychotic naïve, first-episode psychosis patients

Kimberley P. Good, Jonathan Rabinowitz, David Whitehorn, Philip D. Harvey, Goedele DeSmedt, Lili C. Kopala

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

Background: Chronic schizophrenia patients have been sampled for factor analytic studies to identify the factor structure of the Positive and Negative Syndrome Scale (PANSS). Many of these studies have identified a cognitive factor, which may provide useful information about patients for whom formal neuropsychological testing is unavailable. However, the relationship between the clinically rated cognitive factor and performance-based cognitive test scores has not been thoroughly examined, particularly in patients who are early in the course of illness. Objectives: The validity of the PANSS cognitive factor was examined in a sample of antipsychotic naïve, first-episode psychosis patients and the PANSS items that best predicted cognitive functioning were identified. Method: PANSS scores and performance on a battery of cognitive tests from the baseline assessment of a clinical trial of 167 neuroleptic naïve patients with schizophrenia-like illnesses were analyzed. Results: Factor analysis revealed a five-factor model that was consistent with previously described factor models from samples of chronically treated patients. There were modest correlations (less than r=0.44) between the derived cognitive factor and six of the neuropsychological test variables (Wisconsin Card Sorting Test total errors and number of categories correctly sorted, WMS-R immediate and delayed recall scores, Category Fluency total score, and WAIS-R digit symbol). Five PANSS items (P6, N5, N6, G2, and G10) were identified that predicted global cognitive functioning; however, 66% of the variance in cognitive functioning remained unexplained. Conclusions: A PANSS cognitive factor can be identified in first-episode, neuroleptic naïve patients. However, clinical ratings of cognitive deficits lack sensitivity and specificity and thus should not be relied upon fully.

Original languageEnglish (US)
Pages (from-to)11-19
Number of pages9
JournalSchizophrenia Research
Volume68
Issue number1
DOIs
StatePublished - May 1 2004
Externally publishedYes

Keywords

  • First-episode psychosis
  • Neuropsychological test performance
  • PANSS

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Behavioral Neuroscience
  • Biological Psychiatry
  • Neurology
  • Psychology(all)

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