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The Positive and Negative Syndrome Scale (PANSS): A Three-Factor Model of Psychopathology in Marginally Housed Persons with Substance Dependence and Psychiatric Illness

Author

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  • Chantelle J Giesbrecht
  • Norm O’Rourke
  • Olga Leonova
  • Verena Strehlau
  • Karine Paquet
  • Fidel Vila-Rodriguez
  • William J Panenka
  • G William MacEwan
  • Geoffrey N Smith
  • Allen E Thornton
  • William G Honer

Abstract

Rates of psychopathology are elevated in marginalized and unstably housed persons, underscoring the need for applicable clinical measures for these populations. The Positive and Negative Syndrome Scale (PANSS) is a clinical instrument principally developed for use in schizophrenia to identify the presence and severity of psychopathology symptoms. The current study investigates whether a reliable and valid PANSS factor structure emerges in a marginally housed, heterogeneous sample recruited from the Downtown Eastside of Vancouver where substance use disorders and psychiatric illness are pervasive. Participants (n = 270) underwent structured clinical assessments including the PANSS and then were randomly assigned to either exploratory (EFA) or confirmatory factor analytic (CFA) subsamples. EFA pointed to a novel three factor PANSS. This solution was supported by CFA. All retained items (28 out of 30) load significantly upon hypothesized factors and model goodness of fit analyses are in the acceptable to good range. Each of the three first-order factor constructs, labeled Psychosis/Disorganized, Negative Symptoms/Hostility, and Insight/Awareness, contributed significantly to measurement of a higher-order psychopathology construct. Further, the latent structure of this 3-factor solution appears temporally consistent over one-year. This PANSS factor structure appears valid and reliable for use in persons with multimorbidity, including substance use disorders. The structure is somewhat distinct from existing solutions likely due to the unique characteristics of this marginally housed sample.

Suggested Citation

  • Chantelle J Giesbrecht & Norm O’Rourke & Olga Leonova & Verena Strehlau & Karine Paquet & Fidel Vila-Rodriguez & William J Panenka & G William MacEwan & Geoffrey N Smith & Allen E Thornton & William G, 2016. "The Positive and Negative Syndrome Scale (PANSS): A Three-Factor Model of Psychopathology in Marginally Housed Persons with Substance Dependence and Psychiatric Illness," PLOS ONE, Public Library of Science, vol. 11(3), pages 1-14, March.
    • Handle: RePEc:plo:pone00:0151648
    DOI: 10.1371/journal.pone.0151648
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    1. Robertson, M.J. & Clark, R.A. & Charlebois, E.D. & Tulsky, J. & Long, H.L. & Bangsberg, D.R. & Moss, A.R., 2004. "HIV seroprevalence among homeless and marginally housed adults in San Francisco," American Journal of Public Health, American Public Health Association, vol. 94(7), pages 1207-1217.
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