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Development, internal consistency and reliability of the Verona Service Satisfaction Scale - European Version

EPSILON Study 7

Department of Medicine and Public Health, Section of Psychiatry, University of Verona, Italy

BOB VAN WIJNGAARDEN, MA

Department of Psychiatry, Academic Medical Centre, Amsterdam, The Netherlands

HELLE CHARLOTTE KNUDSEN, MD

Institute of Preventive Medicine, Copenhagen University Hospital, Denmark

MORVEN LEESE, PhD

Section of Community Psychiatry (PRiSM), Institute of Psychiatry, King's College, London, UK

LUIS GAITE, MD

Clinical and Social Psychiatry Research Unit, University of Cantabria, Santander, Spain

EPSILON STUDY GROUP

Correspondence: Dr Mirella Ruggeri, Dipartimento di Medicina e Sanità Pubblica, Sezione di Psichiatria, Università di Verona, Ospedale Policlinico, via delle Menegone, 10, 37134 Verona, Italy. Tel: + 39 045 8074441; fax: +39 045 585871; e-mail: mruggeri {at}borgoroma.univr.it

Declaration of interest No conflict of interest. Funding detailed in Acknowledgements.

Background Satisfaction with mental health services is an importantquality and outcome variable. The Verona Service Satisfaction Scale (VSSS) is a well-established method for measuiring service satisfaction.

Aim To report the development and reliability study of the European Version of the VSSS (VSSS-EU).

Method A sample of people with schizophrenia on the case-load of local mental health services in the five European participating countries was assessed. The VSSS-EU was administered at one site in each country at two points in time. Internal consistency and test-retest reliability were assessed and compared between the five sites.

Results The coefficient for the VSSS-EU total score in the pooled sample was 0.96 (95% CI0.94-0.97) and ranged from 0.92 (95% CI0.60-1.00) to 0.96 (95% CI 0.93-0.98) across the sites. Test-retest reliability for VSSS-EU total score, pooled over sites, was 0.82 (95% CI0.78-0.85) and ranged from 0.73 (95% CI0.6-0.86) to 0.93 (95% CI0.89-0.97) across the sites.

Conclusion VSSS-EU is a reliable instrument for measuring service satisfaction in people with schizophrenia, for usein comparative cross-national research projects and in routine clinical practice in mental health services across Europe.

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