The Frankfurt Complaint Questionnaire for self-assessment of basic symptoms in the early detection of psychosis-Factor structure, reliability, and predictive validity.
- Uttinger M Center for Gender Research and Early Detection, University of Basel Psychiatric Hospital, University of Basel, Basel, Switzerland.
- Studerus E Center for Gender Research and Early Detection, University of Basel Psychiatric Hospital, University of Basel, Basel, Switzerland.
- Ittig S Center for Gender Research and Early Detection, University of Basel Psychiatric Hospital, University of Basel, Basel, Switzerland.
- Heitz U Center for Gender Research and Early Detection, University of Basel Psychiatric Hospital, University of Basel, Basel, Switzerland.
- Schultze-Lutter F University Hospital of Child and Adolescent Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland.
- Riecher-Rössler A Center for Gender Research and Early Detection, University of Basel Psychiatric Hospital, University of Basel, Basel, Switzerland.
- 2017-12-22
Published in:
- International journal of methods in psychiatric research. - 2018
Frankfurt Complaint Questionnaire
basic symptoms
confirmatory factor analysis
prediction of psychosis
self-assessment
Adult
Diagnostic Self Evaluation
Female
Humans
Male
Prognosis
Psychiatric Status Rating Scales
Psychotic Disorders
Reproducibility of Results
Schizophrenia
Self Report
Young Adult
English
OBJECTIVES
Patients with schizophrenia often experience subtle disturbances in several domains of information processing-so-called basic symptoms (BS). BS are already present before onset of frank psychosis and can be assessed by interviews but also by the self-administered Frankfurt Complaint Questionnaire (FCQ). We investigated the factor structure, reliability, and predictive validity for transition to psychosis of the FCQ, comparing previously proposed factor solutions containing 1, 2, 4, and 10 factors.
METHODS
Confirmatory factor analysis was used in a sample of 117 at-risk mental state and 92 first-episode psychosis participants of the Basel FePsy (early detection of psychosis) study.
RESULTS
Although all factor models fitted to the data, the 2- or 4-factor solutions performed best among the models that used at least half of the FCQ items, suggesting the covariance between FCQ items is best explained by 2 to 4 underlying factors. No FCQ-scale predicted transition to psychosis.
CONCLUSION
We could confirm a 2- to 4-factor structure of the FCQ in a sample of at-risk mental state and first-episode psychosis patients using confirmatory factor analysis. Contrary to interview-assessed cognitive-perceptive BS, self-assessed BS do not seem to improve prediction of psychosis. This result reinforces reports of poor correspondence between interview- and questionnaire-assessed BS.
Patients with schizophrenia often experience subtle disturbances in several domains of information processing-so-called basic symptoms (BS). BS are already present before onset of frank psychosis and can be assessed by interviews but also by the self-administered Frankfurt Complaint Questionnaire (FCQ). We investigated the factor structure, reliability, and predictive validity for transition to psychosis of the FCQ, comparing previously proposed factor solutions containing 1, 2, 4, and 10 factors.
METHODS
Confirmatory factor analysis was used in a sample of 117 at-risk mental state and 92 first-episode psychosis participants of the Basel FePsy (early detection of psychosis) study.
RESULTS
Although all factor models fitted to the data, the 2- or 4-factor solutions performed best among the models that used at least half of the FCQ items, suggesting the covariance between FCQ items is best explained by 2 to 4 underlying factors. No FCQ-scale predicted transition to psychosis.
CONCLUSION
We could confirm a 2- to 4-factor structure of the FCQ in a sample of at-risk mental state and first-episode psychosis patients using confirmatory factor analysis. Contrary to interview-assessed cognitive-perceptive BS, self-assessed BS do not seem to improve prediction of psychosis. This result reinforces reports of poor correspondence between interview- and questionnaire-assessed BS.
- Language
-
- English
- Open access status
- bronze
- Identifiers
-
- DOI 10.1002/mpr.1600
- PMID 29266529
- Persistent URL
- https://sonar.rero.ch/global/documents/244836
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