Journal article
The Portuguese version of the Outcome Questionnaire (OQ-45): Normative data, reliability, and clinical significance cut-offs scores
Psychology and Psychotherapy, Vol.88(4), pp.427-437
2015
PMID: 25484181
Abstract
Objectives:
The Outcome Questionnaire (OQ-45) is one of the most extensively used standardized self-report instruments to monitor psychotherapy outcomes. The questionnaire is designed specifically for the assessment of change during psychotherapy treatments. Therefore, it is crucial to provide norms and clinical cut-off values for clinicians and researchers. The current study aims at providing study provides norms, reliability indices, and clinical cut-off values for the Portuguese version of the scale.
Method:
Data from two large non-clinical samples (high school/university, N = 1,669; community, N = 879) and one clinical sample (n = 201) were used to investigate psychometric properties and derive normative data for all OQ-45 subscales and the total score.
Results:
Significant and substantial differences were found for all subscales between the clinical and non-clinical sample. The Portuguese version also showed adequate reliabilities (internal consistency, test–retest), which were comparable to the original version. To assess individual clinical change, clinical cut-off values and reliable change indices were calculated allowing clinicians and researchers to monitor and evaluate clients' individual change.
Conclusion:
The Portuguese version of the OQ-45 is a reliable instrument with comparable Portuguese norms and cut-off scores to those from the original version. This allows clinicians and researchers to use this instrument for evaluating change and outcome in psychotherapy.
Details
- Title
- The Portuguese version of the Outcome Questionnaire (OQ-45): Normative data, reliability, and clinical significance cut-offs scores
- Authors
- Paulo P. P. Machado (Corresponding Author) - University of MinhoDaniel B. Fassnacht (Author) - James Cook University Singapore
- Publication details
- Psychology and Psychotherapy, Vol.88(4), pp.427-437
- Publisher
- John Wiley & Sons Ltd.
- DOI
- 10.1111/papt.12048
- ISSN
- 2044-8341
- PMID
- 25484181
- Grant note
- PTDC/PSI-PCL/099981/2008 / Fundacao para a Ciencia e a Tecnologia / Foundation for Science and Technology, Portugal
- Organisation Unit
- School of Health - Psychology
- Language
- English
- Record Identifier
- 99726820102621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Psychiatry
- Psychology
- Psychology, Clinical
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