ArticleEarly intervention in psychiatry2017
Factor analysis of the Scale of Prodromal Symptoms: data from the Early Detection and Intervention for the Prevention of Psychosis Program.
Article in Early intervention in psychiatry, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.
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Who cites it
19 citing papers in PubMed, 1 synthesis or guideline pooled it, 32 citations in OpenAlex.
- Interventions for obtaining and maintaining employment in adults with severe mental illness, a network meta-analysis.The Cochrane database of systematic reviews · 2017Pooled it
- Baseline psychopathology and relationship to longitudinal functional outcome in attenuated and early first episode psychosis.Schizophrenia research · 2019Trial
- Retina in Clinical High-Risk and First-Episode Psychosis.Schizophrenia bulletin · 2026Article
- Eye movement abnormalities in autism spectrum disorder and prodromal psychosis: a review of overlaps and biomarkers.Frontiers in child and adolescent psychiatry · 2026Review
- Examining the Complex Mismatch Negativity in Early Phase Psychosis Using the Dual Rule Paradigm.Clinical EEG and neuroscience · 2025Article
- The Complex Latent Structure of Attenuated Psychotic Symptoms: Hierarchical and Bifactor Models of SIPS Symptoms Replicated in Two Large Samples at Clinical High Risk for Psychosis.Schizophrenia bulletin · 2024Article
- Validation of the structured interview section of the penn computerized adaptive test for neurocognitive and clinical psychopathology assessment (CAT GOASSESS).Psychiatry research · 2024Article
- Symptoms of Attenuated Psychosis Syndrome in Relatives of Clinical High-Risk Youth: Preliminary Evidence.Schizophrenia bulletin · 2023Article
- Bridging the phenomenological gap between predictive basic-symptoms and attenuated positive symptoms: a cross-sectional network analysis.Schizophrenia (Heidelberg, Germany) · 2022Article
- Negative Symptom Domains in Children and Adolescents at Ultra-High Risk for Psychosis: Association With Real-Life Functioning.Schizophrenia bulletin open · 2022Article
- The nature, consequences, mechanisms, and management of sleep disturbances in individuals at-risk for psychosis.Frontiers in psychiatry · 2022Review
- Turkish Version of Structured Interview of Psychosis-Risk Syndromes (SIPS) and Proposal of a Brief Version of SIPS as a Pretest Risk Enrichment.Noro psikiyatri arsivi · 2022Article
- Structure of positive psychotic symptoms in individuals at clinical high risk for psychosis.Early intervention in psychiatry · 2021Article
- Main Symptomatic Treatment Targets in Suspected and Early Psychosis: New Insights From Network Analysis.Schizophrenia bulletin · 2020Article
- Validity and utility of Hierarchical Taxonomy of Psychopathology (HiTOP): I. Psychosis superspectrum.World psychiatry : official journal of the World Psychiatric Association (WPA) · 2020Article
- Predictive validity of conversion from the clinical high risk syndrome to frank psychosis.Schizophrenia research · 2020Article
- The Critical Need for Help-Seeking Controls in Clinical High-Risk Research.Clinical psychological science : a journal of the Association for Psychological Science · 2019Article
- Factor Analysis of Negative Symptom Items in the Structured Interview for Prodromal Syndromes.Schizophrenia bulletin · 2019Article
- Schizophrenia-related cognitive dysfunction in the Cyclin-D2 knockout mouse model of ventral hippocampal hyperactivity.Translational psychiatry · 2018Article
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Authors and funding
12 authors at 6 institutions in 1 country.
Funding
Abstract
aimThe Scale of Prodromal Symptoms (SOPS) was developed to identify individuals experiencing early signs of psychosis, a critical first step towards early intervention. Preliminary dimension reduction analyses suggested that psychosis-risk symptoms may deviate from the traditional symptom structure of schizophrenia, but findings have been inconsistent. This study investigated the phenomenology of psychosis risk symptoms in a large sample from a multi-site, national study using rigorous factor analysis procedure.
methodsParticipants were 334 help-seeking youth (age: 17.0 ± 3.3) from the Early Detection and Intervention for the Prevention of Psychosis Program, consisting of 203 participants at clinically higher risk (sum of P scores ≥ 7), 87 with clinically lower risk (sum of P scores < 7) and 44 in very early first-episode psychosis (<30 days of positive symptoms). Baseline SOPS data were subjected to principal axis factoring (PAF), estimating factors based on shared variance, with Oblimin rotation.
resultsPAF yielded four latent factors explaining 36.1% of total variance: positive symptoms; distress; negative symptoms; and deteriorated thought process. They showed reasonable internal consistency and good convergence validity, and were not orthogonal.
conclusionsThe empirical factors of the SOPS showed similarities and notable differences compared with the existing SOPS structure. Regrouping the symptoms based on the empirical symptom dimensions may improve the diagnostic validity of the SOPS. Relative prominence of the factors and symptom frequency support early identification strategies focusing on positive symptoms and distress. Future investigation of long-term functional implications of these symptom factors may further inform intervention strategies.
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