• Lorraine Hester, Lorna Jane O'Doherty, Rebecca Schnittger, Niamh Skelly, Muireann O'Donnell, Lisa Butterly, Robert Browne, Charlotte Frorath, Craig Morgan, Declan M McLoughlin, and Paul Fearon.
• Department of Psychiatry, St Patrick's University Hospital, Trinity College Dublin, Dublin, Ireland.
• Int J Qual Health Care. 2015 Aug 1; 27 (4): 284-90.

ObjectiveTo develop a quality of care instrument that is grounded in the service user perspective and validate it in a mental health service.DesignThe instrument (SEQUenCE (SErvice user QUality of CarE)) was developed through analysis of focus group data and clinical practice guidelines, and refined through field-testing and psychometric analyses.SettingAll participants were attending an independent mental health service in Ireland.ParticipantsParticipants had a diagnosis of bipolar affective disorder (BPAD) or a psychotic disorder.InterventionsTwenty-nine service users participated in six focus group interviews. Seventy-one service users participated in field-testing: 10 judged the face validity of an initial 61-item instrument; 28 completed a revised 52-item instrument from which 12 items were removed following test-retest and convergent validity analyses; 33 completed the resulting 40-item instrument.Main Outcome MeasuresTest-retest reliability, internal consistency and convergent validity of the instrument.ResultsThe final instrument showed acceptable test-retest reliability at 5-7 days (r = 0.65; P < 0.001), good convergent validity with the Verona Service Satisfaction Scale (r = 0.84, P < 0.001) and good internal consistency (Cronbach's alpha = 0.87).ConclusionsSEQUenCE is a valid, reliable scale that is grounded in the service user perspective and suitable for routine use. It may serve as a useful tool in individual care planning, service evaluation and research. The instrument was developed and validated with service users with a diagnosis of either BPAD or a psychotic disorder; it does not yet have established external validity for other diagnostic groups.© The Author 2015. Published by Oxford University Press in association with the International Society for Quality in Health Care; all rights reserved.

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