Subjective and objective dimensions of quality of life in psychiatric patients: a factor analytical approach - The South Verona Outcome Project 4

Background Both subjective and objective information is necessary to assess quality of life (QOL). Aims To explore the role of subjective and objective QOL dimensions and the ir cross-sectional and longitudinal predictors. Method The relationship between QOL, as measured by the Lancashire Quality of Life Profile (LQL), and demographic variables, diagnosis, psychopatholog y, disability, functioning, affect balance, self-esteem service use and ser vice satisfaction was investigated at two points in time, using factor anal ysis and multiple regression techniques. Results One subjective and two objective LQL factors with strong face valid ity were identified. Cross-sectional predictors of the subjective factor we re primarily subjective measures; longitudinally, few predictors of this fa ctor were identified,The cross-sectional and longitudinal predictors of the objective factors were primarily demographic and observer-rated measures. onclusions Subjective and objective data are distinct types of information. Objective measures may be more suitable in detecting treatment effects. Su bjective information is necessary to complete the QOL picture and to enhanc e the interpretation of objective data. Declaration of interest This study was supported by the Istituto Superiore' di Sanita (ISS), Roma, Progetto Nazionale Salute Mentale, with a grant (no. 96/QT/50) to M.R.