Quality of life in a psychiatric sample: psychometric assessment of the WHOQOL-BREF
14th European Conference on Psychological Assessment
The purpose of this study was to test the psychometric properties of the WHOQOL-Bref in a psychiatric sample. A cross-sectional design was used and 403 participants were recruited from mental health care facilities. Construct validity was assessed through confirmatory factor analysis (CFA) and item-domains correlations. Predictive validity was evaluated via multiple regressions. Internal consistency was analyzed by using Cronbach’s alpha. Results from CFA second-order hierarchical model and item-domain correlational analyses supported the construct validity of the WHOQOL-Bref. A 5-domain model (psychological, physical, socialrelationships, environment and level of independence) demonstrated good-fit and adequate internal consistency. Multiple regression analyses of the domains with overall quality of life (QOL), general health and general QOL were supportive of the predictive validity. The results of the present study add to a growing body of research findings providing support for the use of the WHOQOL-Bref in psychiatric inpatients and outpatients. The WHOQOL-Bref is a valuable tool to be incorporated as part of the routine clinical evaluation, monitoring and an important indicator of treatment outcome and research Due to the cross-sectional nature of this study, findings should be replicated using a longitudinal research design. Our findings suggest an innovative approach of the WHOQOL-Bref dimensionality since it provides evidence for a conceptual distinction between the physical domain and level of independence domain in this short version of the WHOQOL, as proposed by the WHOQOL-100; highlighting the need to carefully investigate the dimensional structure of the WHOQOL-Bref across different subgroups, providing further clarity on its performance in psychiatric samples.
WHOQOL-Bref; Quality of life; Mental illness; Confirmatory factor analysis; Validity