City Research Online

Abstract

PURPOSE: This study assesses the construct validity and sensitivity to change of the Short Warwick-Edinburgh Mental Well-being Scale (SWEMWBS) as an outcome measure in the treatment of common mental disorders (CMD) in primary care settings.

METHODS: 127 participants attending up to 5 sessions of therapy for CMD in primary care self-rated the SWEMWBS, the Patient Health Questionnaire (PHQ-9) and General Anxiety Disorder (GAD-7) scales. SWEMWBS's construct validity and sensitivity to change was evaluated against the PHQ-9 and GAD-7 across multiple time points in two ways: correlation coefficients were calculated between the measures at each time point; and sensitivity to change over time was assessed using repeated measures ANOVA.

RESULTS: Score distributions on SWEMWBS, but not PHQ-9 and GAD-7, met criteria for normality. At baseline, 92.9% (118/127) of participants scored above clinical threshold on either PHQ-9 or GAD-7. Correlations between SWEMWBS and PHQ-9 scores were calculated at each respective time point and ranged from 0.601 to 0.793. Correlations between SWEMWBS and GAD-7 scores were calculated similarly and ranged from 0.630 to 0.743. Significant improvements were seen on all three scales over time. Changes in PHQ-9 and GAD-7 were curvilinear with greatest improvement between sessions 1 and 2. Change in SWEMWBS was linear over the five sessions.

CONCLUSIONS: This exploratory study suggests that SWEMWBS is acceptable as a CMD outcome measure in primary care settings, both in terms of construct validity and sensitivity to change. Given patient preference for positively over negatively framed measures and statistical advantages of measures which are normally distributed, SWEMWBS could be used as an alternative to PHQ-9 and GAD-7 in monitoring and evaluating CMD treatment.

Publication Type:	Article
Additional Information:	This article has been published in Health and Quality of Life Outcomes, by BMC, DOI: https://doi.org/10.1186/s12955-021-01882-x. It is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
Publisher Keywords:	SWEMWBS, PHQ-9, GAD-7 mental wellbeing, Anxiety, Depression, Outcome measure, Counselling, Primary care, Clinical
Subjects:	B Philosophy. Psychology. Religion > BF Psychology R Medicine > RA Public aspects of medicine
Departments:	School of Health & Psychological Sciences > Healthcare Services Research & Management
SWORD Depositor:	Symplectic Administrator

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