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Reliability, Validity, Epidemiology, and Cultural Variation of the Structured Interview for Psychosis-Risk Syndromes (SIPS) and the Scale of Psychosis-Risk Symptoms (SOPS)

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Handbook of Attenuated Psychosis Syndrome Across Cultures

Abstract

The Structured Interview for Psychosis-risk Syndromes (SIPS) has been one of most commonly used instruments worldwide for diagnosing and evaluating subjects with a clinical high-risk (CHR) syndrome for psychosis. Early papers, book chapters, and monographs on the SIPS had been cited more than 1500 unduplicated times by June of 2018, including citations from 30 countries. Included within the SIPS diagnostic instrument is a 19-item severity scale, the Scale of Psychosis-risk Symptoms (SOPS), with 5 positive, 6 negative, 4 disorganization, and 4 general items, each scored 0–6. Approximately 95% of CHR cases meet SIPS criteria for the attenuated positive symptoms subtype. The median SOPS total score across CHR samples was 35.9 and across healthy subject samples 2.3. The median inter-rater reliability of the SIPS diagnosis across 16 samples reporting kappa was excellent at 0.89. SOPS reliabilities were comparable. Evidence for predictive, convergent, and discriminant validity was generally strong. Median CHR prevalence among 9 general epidemiology studies was 3.3% and in 11 clinical samples 20.3%. These favorable psychometric properties seemed to hold across culture.

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Authors and Affiliations

  1. PRIME Clinic for Attenuated Psychosis Syndromes, Yale University, New Haven, CT, USA

    Scott W. Woods, Barbara C. Walsh, Albert R. Powers III & Thomas H. McGlashan

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  1. Scott W. Woods
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  2. Barbara C. Walsh
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  3. Albert R. Powers III
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  4. Thomas H. McGlashan
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Correspondence to Scott W. Woods .

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Editors and Affiliations

  1. Department of Psychology College of Social Sciences, Arts and Humanities, Florida A&M University, Tallahassee, FL, USA

    Huijun Li

  2. Department of Psychiatry Early Psychosis Programs, University of California-Davis, Sacramento, CA, USA

    Daniel I. Shapiro

  3. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA

    Daniel I. Shapiro  & Larry J. Seidman  & 

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Woods, S.W., Walsh, B.C., Powers, A.R., McGlashan, T.H. (2019). Reliability, Validity, Epidemiology, and Cultural Variation of the Structured Interview for Psychosis-Risk Syndromes (SIPS) and the Scale of Psychosis-Risk Symptoms (SOPS). In: Li, H., Shapiro, D.I., Seidman, L.J. (eds) Handbook of Attenuated Psychosis Syndrome Across Cultures. Springer, Cham. https://doi.org/10.1007/978-3-030-17336-4_5

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