Psychometric evaluation of the Questionnaire about the Process of Recovery (QPR)

Williams, Julie and Leamy, Mary and Pesola, Francesca and Bird, Victoria and Le Boutillier, Clair and Slade, Mike (2015) Psychometric evaluation of the Questionnaire about the Process of Recovery (QPR). British Journal of Psychiatry, 207 (6). pp. 551-555. ISSN 1472-1465

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Abstract

Background: Supporting recovery is the aim of national mental health policy in many countries, including England. There is a need for standardised measures of recovery, to assess policy implementation and inform clinical practice. Only one measure of recovery has been developed in England: the Questionnaire about the Process of Recovery (QPR) which measures recovery from the perspective of adult mental health service users with a psychosis diagnosis.

Aims: To independently evaluate the psychometric properties of the 15-item and 22-item versions of QPR.

Method: Two samples were used: Dataset 1 (n=88) involved assessment of QPR at baseline, two weeks and three months. Dataset 2 (n=399; ISRCTN02507940) involved assessment of QPR at baseline and one year.

Results: For the 15-item version, internal consistency was 0.89, convergent validity was 0.73, test-retest reliability was 0.74 and sensitivity to change was 0.40. Confirmatory factor analysis showed the 15-item version offered a good fit. For the 22 item version comprising two sub-scales, the Interpersonal sub-scale was found to under-perform and the Intrapersonal sub-scale overlaps substantially with the 15 item version. Conclusions: Both the 15-item and the Intrapersonal sub-scale of the 22-item versions of the QPR demonstrated satisfactory psychometric properties. The 15-item version is slightly more robust and also less burdensome, so it can be recommended for use in research and clinical practice.

Declaration of interest: None.

Item Type: Article
Additional Information: This is an author-produced electronic version of an article accepted for publication in the British Journal of Psychiatry. The definitive publisher-authenticated version is available online at http://bjp.rcpsych.org/content/207/6/551
Schools/Departments: University of Nottingham, UK > Faculty of Medicine and Health Sciences > School of Health Sciences
Identification Number: https://doi.org/10.1192/bjp.bp.114.161695
Depositing User: Slade, Mike
Date Deposited: 10 Dec 2015 11:27
Last Modified: 08 Dec 2016 20:28
URI: http://eprints.nottingham.ac.uk/id/eprint/31028

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