[The PANSS (Positive And Negative Symptom) Scale]

Area of Science:

• Psychiatry
• Clinical Psychology
• Psychopathology Assessment

Background:

• The Positive and Negative Syndrome Scale (PANSS) is a widely used 30-item scale for evaluating psychopathological symptoms in psychotic disorders, particularly schizophrenia.
• It was developed by Kay et al. in 1987 and has been translated into French, featuring a semi-structured interview and precise symptom definitions.
• The scale demonstrates satisfactory inter-rater and test-retest reliability.

Purpose of the Study:

• To evaluate the psychometric properties and clinical utility of the PANSS scale in assessing schizophrenia.
• To examine the factorial structure and validity of the PANSS by comparing it with other established schizophrenia scales.
• To explore the application of the PANSS in understanding symptomatic profiles and prognostic factors in psychotic patients.

Main Methods:

• Factor analysis was employed to validate the PANSS scale.
• Comparisons were made with data from other schizophrenia assessment tools, such as the SANS and SAPS scales.
• The scale's ability to assess positive, negative, and general psychopathology dimensions was investigated.

Main Results:

• Factor analyses identified three primary dimensions: positive symptoms, negative symptoms, and disorganization.
• The PANSS scale provides reliable assessment of symptom severity and dimensions in patients with psychotic syndromes.
• The scale is increasingly utilized for studying symptomatic profiles and prognostic influences.

Conclusions:

• The PANSS scale is a valuable and increasingly adopted instrument for the comprehensive assessment of schizophrenia.
• Its three-dimensional structure (positive, negative, general psychopathology) is supported by factorial analyses.
• Ongoing research aims to confirm findings and refine the understanding of the PANSS conceptual model for broader clinical relevance.