Functional remission in schizophrenia: A FROGS-based definition and its convergent validity

Area of Science:

• Psychiatry
• Clinical Psychology
• Neuroscience

Background:

• Functional remission is achieved by only one-third of schizophrenia patients post-symptomatic remission.
• The Functional Remission Of General Schizophrenia (FROGS) scale was previously developed to measure functional remission across three key dimensions.

Purpose of the Study:

• To establish a threshold for functional remission using the three dimensions of the FROGS scale.
• To compare the psychometric properties of the FROGS scale with other functional remission scales (GAF, PSP, PSRS).

Main Methods:

• The FROGS scale was administered to 295 schizophrenia patients across different European countries.
• Psychometric properties were evaluated, and the FROGS was compared against GAF, PSP, and PSRS.
• Associations with external validators, including clinical remission, PANSS score, hospitalization history, and employment status, were assessed.

Main Results:

• The FROGS scale demonstrated a simple, valid threshold for functional remission.
• The FROGS scale showed good convergent validity when compared to GAF, PSP, and PSRS.
• All four scales (FROGS, GAF, PSP, PSRS) were similarly influenced by PANSS scores, clinical remission status, hospitalization history, and paid work.

Conclusions:

• The FROGS scale provides a straightforward and reliable method for assessing functional remission in schizophrenia.
• The established threshold for the FROGS scale facilitates clinical evaluation of functional recovery.
• The FROGS scale is a valuable instrument for improving the assessment of functional remission in schizophrenia patients.