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The British Journal of Psychiatry (2000) 177: 42-46
© 2000 The Royal College of Psychiatrists

Self-report quality of life measure for people with schizophrenia : the SQLS

GREG WILKINSON, FRCPsych

Department of Psychiatry, University of Liverpool, Royal Liverpool Hospital, Liverpool

BERNADETTE HESDON, MSc

Department of Neuropsychology, University of Liverpool, Royal Liverpool Hospital

DIANE WILD, MSc

Oxford Outcomes, Headington, Oxford

RON COOKSON, PhD

Janssen-Cilag Ltd, High Wycombe

CAROLE FARINA, BSc

Outcomes Research, Janssen-Cilag Ltd, High Wycombe

VIMAL SHARMA, FRCPsych

Department of Psychiatry, University of Liverpool, Royal Liverpool Hospital

RAY FITZPATRICK, PhD

Nuffield College, Oxford

CRISPIN JENKINSON, DPhil

Health Services Research Unit, University of Oxford, Institute of Health Sciences, Headington, Oxford

Correspondence: Professor Greg Wilkinson, University Department of Psychiatry, Royal Liverpool University Hospital, Prescot Street, Liverpool L69 3BX

Declaration of interest Janssen-Cilag Ltd funded the project. G.W. is Editor of The British Journal of Psychiatry.

Background Quality of life is the subject of growing interest and investigation.

Aims To develop and validate a short, self-report quality of life questionnaire (the Schizophrenia Quality of Life Scale, SQLS).

Method People with schizophrenia in Liverpool were recruited via the NHS. Items, generated from in-depth interviews, were developed into an 80-item self-report questionnaire. Data were factor analysed, and a shorter form measure was tested for reliability and validity. This measure was administered together with other self-report measures - SF-36, GHQ-12 and HADS - to assess validity.

Results Data were analysed to produce a final 30-item questionnaire, comprising three scales (‘psychosocial’, ‘motivation and energy’, and ‘symptoms and side-effects’) addressing different SQLS dimensions. Internal consistency reliability of the scale was found to be satisfactory. There was a high level of association with relevant SF-36, GHQ-12 and HADS scores.

Conclusions The SQLS was completed within 5-10 minutes. It possesses internal reliability and construct validity, and promises to be a useful tool for the evaluation of new treatment regimes for people with schizophrenia.




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