Psychosis risk screening: Validation of the youth psychosis at ‐risk questionnaire – brief in a community‐derived sample of adolescents

Abstract
There have been several attempts to identify individuals potentially at high risk for psychotic‐spectrum disorders using brief screening measures. However, relatively few studies have tested the psychometric properties of the psychosis screening measures in representative samples of adolescents. The main purpose of the present study was to analyse the prevalence, factorial structure, measurement invariance across gender, and reliability of the Youth Psychosis At‐Risk Questionnaire – Brief (YPARQ‐B) in a community‐derived sample of adolescents. Additionally, the relationship between YPARQ‐B, depressive symptoms, psychopathology, stress manifestations, and prosocial skills was analysed. One thousand and twenty students from high schools participated in a cross‐sectional survey. The YPARQ‐B, the Reynolds Adolescent Depression Scale, the Strengths and Difficulties Questionnaire, and the Student Stress Inventory – Stress Manifestations were used. A total of 85.1% of the total sample self‐reported at least one subclinical psychotic experience. We observed a total of 10.9% of adolescents with a cutoff score of ≥11 or 6.8% with a cutoff score of ≥13. The analysis of internal structure of the YPARQ‐B yielded an essentially unidimensional structure. The YPARQ‐B scores showed measurement invariance across gender. The internal consistency of the YPARQ‐B total score was 0.94. Furthermore, self‐reported subclinical psychotic experiences were associa...

Source: International Journal of Methods in Psychiatric Research - October 26, 2016 Category: Psychiatry Authors: Eduardo Fonseca ‐Pedrero, Javier Ortuño‐Sierra, Edurne Chocarro, Felix Inchausti, Martin Debbané, Julio Bobes Tags: ORIGINAL ARTICLE Source Type: research