Predominance of symptoms over time in early-onset psychosis: a principal component factor analysis of the Positive and Negative Syndrome Scale.
J Clin Psychiatry
; 71(3): 327-37, 2010 Mar.
Article
em En
| MEDLINE
| ID: mdl-20331934
ABSTRACT
BACKGROUND:
Early-onset psychosis is a symptomatically nonspecific and heterogeneous entity composed of several diagnoses. This study examined the dimensional structure of symptoms and the temporal stability of this structure during a 6-month follow-up.METHOD:
A principal component factor analysis of the Positive and Negative Syndrome Scale was conducted at baseline, 4 weeks, and 6 months in a sample of 99 first-episode psychotic patients (mean age = 15.5 years).RESULTS:
The factor analysis produced a 5-dimension solution (Positive, Negative, Depression, Cognitive, Hostility) that explained 62.4% of the variance at baseline, 63.4% at 4 weeks, and 65.1% at 6 months. Negative dimension was the most consistent and stable over time and was predominant at baseline (23.9%) and at 4 weeks (25.7%). Depression was predominant at 6 months (31.1%).CONCLUSIONS:
There is a stable 5-dimension structure of symptoms in early-onset psychosis with varying predominance of symptoms over time. Negative symptoms are a core feature of psychosis and are thus important diagnostic criteria.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Escalas de Graduação Psiquiátrica
/
Transtornos Psicóticos
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
Limite:
Adolescent
/
Child
/
Female
/
Humans
/
Male
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article