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  1. Yunus NA, Sturgiss E, Soh SE
    Obes Res Clin Pract, 2023 Dec 01.
    PMID: 38042691 DOI: 10.1016/j.orcp.2023.11.004
    OBJECTIVE: This study aimed to evaluate the structural validity of the Universal Measures of Bias - Fat (UMB Fat) among Malaysian healthcare practitioners using Rasch analysis.

    METHODS: Data from a cross-sectional survey of 268 public and private doctors and allied health practitioners in Peninsular Malaysia were used for this analysis. Using Rasch analysis, overall model fit and item fit of the summary UMB Fat and domain scores were examined, together with unidimensionality, response threshold ordering, internal consistency, measurement invariance, and item targeting.

    RESULTS: Data showed overall misfit to the Rasch model for both the summary UMB Fat score and domain scores. Whilst unidimensionality was observed for the domain scores, this was not evident for the summary score where multiple local dependencies were present. Disordered thresholds were observed for the response format, in which the majority improved with modification. Suboptimal targeting was also detected with an uneven distribution of items at the upper and lower end of the logit scale for the summary and domain scores. Despite this, excellent internal consistency reliability was observed (person separation index: 0.76-0.89), and no measurement invariance was detected.

    CONCLUSION: The Rasch model supports reporting of the UMB Fat domain scores but not the summary score. Several issues related to local dependencies and response format were identified that could benefit from refining the UMB Fat to improve measurement accuracy, particularly when used by healthcare practitioners in Asian countries.

  2. Yunus NA, Russell G, Muhamad R, Soh SE, Sturgiss E
    BMC Health Serv Res, 2023 Jul 10;23(1):744.
    PMID: 37430243 DOI: 10.1186/s12913-023-09759-z
    BACKGROUND: Practitioners' perceptions of patients with obesity and obesity management shape their engagement in obesity care delivery. This study aims to describe practitioners' perceptions, experiences and needs in managing patients with obesity, determine the extent of weight stigma among health practitioners, and identify the factors associated with negative judgment towards patients with obesity.

    METHODS: A cross-sectional online survey was conducted from May to August 2022 with health practitioners commonly involved in obesity management in Peninsular Malaysia, including doctors in primary care, internal medicine and bariatric surgery, and allied health practitioners. The survey explored practitioners' perceptions, barriers and needs in managing obesity, and evaluated weight stigma using the Universal Measures of Bias - Fat (UMB Fat) questionnaire. Multiple linear regression analysis was used to identify demographic and clinical-related factors associated with higher negative judgment towards patients with obesity.

    RESULTS: A total of 209 participants completed the survey (completion rate of 55.4%). The majority (n = 196, 94.3%) agreed that obesity is a chronic disease, perceived a responsibility to provide care (n = 176, 84.2%) and were motivated to help patients to lose weight (n = 160, 76.6%). However, only 22% (n = 46) thought their patients were motivated to lose weight. The most frequently reported barriers to obesity discussions were short consultation time, patients' lack of motivation, and having other, more important, concerns to discuss. Practitioners needed support with access to multi-disciplinary care, advanced obesity training, financing, comprehensive obesity management guidelines and access to obesity medications. The mean (SD) of the UMB Fat summary score was 2.99 (0.87), with the mean (SD) domain scores ranging between 2.21 and 4.36 (1.06 to 1.45). No demographic and clinical-related factors were significantly associated with negative judgment from the multiple linear regression analyses.

    CONCLUSION: Practitioners in this study considered obesity a chronic disease. While they had the motivation and capacity to engage in obesity management, physical and social opportunities were the reasons for not discussing obesity with their patients. Practitioners needed more support to enhance their capability and opportunity to engage with obesity management. Weight stigma in healthcare settings in Malaysia should be addressed, given the possibility of hindering weight discussions with patients.

  3. Yunus NA, Russell G, Muhamad R, Chai TL, Ahmad Zawawi MAF, Sturgiss E
    Obes Rev, 2023 Nov;24(11):e13619.
    PMID: 37558504 DOI: 10.1111/obr.13619
    Sociocultural and biological backgrounds significantly influence people's experience of obesity. Yet the experience within the Asian sociocultural context is underexplored. This scoping review aims to summarize the qualitative evidence that explores the lived experience of adults with obesity in Asian countries. Guided by the Joanna Briggs Institute (JBI) approach, we systematically searched five databases (MEDLINE, EMBASE, PsychINFO, CINAHL, and Scopus) for studies exploring the lived experience of adults with obesity in Asian countries. Eligible studies with English full text were screened by two reviewers and analyzed using a descriptive qualitative content analysis. Of the 16,764 articles retrieved, 11 were included. The qualitative data can be summarized into three categories: (1) cultural norms shaped the lived experience with obesity, (2) the influence of obesity on social relationships, and (3) coping with life challenges. Despite the small number of studies, a strong influence of the sociocultural environment on the lived experience of obesity was evident, particularly on social roles and expectations, social relationships, the stigma of obesity, and life challenges. The extent and significance of this sociocultural influence on the Asian population warrant further exploration. Future research should fully report the qualitative methods to provide contextual information about the study.
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