Factor analysis of the Scale of Prodromal Symptoms: data from the Early Detection and Intervention for the Prevention of Psychosis Program
Publication Date
2014
Journal Title
Early Interv Psychiatry
Abstract
AIM: The 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. METHODS: Participants 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 (
Volume Number
11
Issue Number
1
Pages
14-22
Document Type
Article
EPub Date
2014/12/23
Status
Faculty
Facility
School of Medicine
Primary Department
Psychiatry
Additional Departments
Molecular Medicine
PMID
DOI
10.1111/eip.12209