Assessing self‐reported clinical high risk symptoms: The psychometric properties of the polish version of the prodromal questionnaire‐brief and a proposal for an alternative approach to scoring

Background Psychotic‐like experiences (PLEs) might occur in the general population as low‐risk individual differences or prodromal features, requiring quick detection and early intervention. The aims of this study were to conduct a mini‐systematic review of the prognostic abilities of the Prodromal...

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Bibliographic Details
Published in:Early intervention in psychiatry 2021-10, Vol.15 (5), p.1059-1071
Main Authors: Starkowska, Anna, Tyburski, Ernest, Kucharska‐Mazur, Jolanta, Mak, Monika, Samochowiec, Jerzy
Format: Article
Language:English
Subjects:
Cluster analysis
Criteria
high risk of psychosis
Population
PQ‐B
PRIME
prodromal screening
prodromal state
Quantitative psychology
Questionnaires
Reliability analysis
Risk
Screening
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Summary:Background Psychotic‐like experiences (PLEs) might occur in the general population as low‐risk individual differences or prodromal features, requiring quick detection and early intervention. The aims of this study were to conduct a mini‐systematic review of the prognostic abilities of the Prodromal Questionnaire‐Brief (PQ‐B), describe the PLEs distribution for the first time in a Polish population, assess PQ‐B reliability and propose an innovative scoring approach based on cluster analysis. Methods Five hundred and twenty eight (334 female) adult volunteers underwent screening with the PQ‐B, 49% also underwent the early psychosis screening test PRIME, to verify the tests' psychometric properties, to compare the prognostic accuracy of the PQ‐B to the more restrictive PRIME, and to the detected types of possible diagnosis in the general population. Results Almost 70% of respondents met the prognostic criteria of the PQ‐B while only 30.6% met the PRIME criteria. Both tests proved reliable (α > .835) and valid (rho >.710; P 
ISSN:1751-7885
1751-7893
DOI:10.1111/eip.13035