2023 |
Catania J, Spirou D, Gascoigne M, Raman J, 'Loss of control as a transdiagnostic feature in obesity-related eating behaviours: A systematic review.', Eur Eat Disord Rev, 31 24-45 (2023) [C1]
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Nova |
2022 |
Kneebone II, Van Zanden BE, Dorstyn DS, Roberts RM, Lord SR, Querstret D, et al., 'Relaxation and related therapies for people with multiple sclerosis (MS): A systematic review.', Clinical rehabilitation, 36 883-899 (2022) [C1]
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Nova |
2022 |
Spirou D, Raman J, Bishay RH, Ahlenstiel G, Smith E, 'Childhood trauma, posttraumatic stress disorder symptoms, early maladaptive schemas, and schema modes: a comparison of individuals with obesity and normal weight controls.', BMC psychiatry, 22 517 (2022) [C1]
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Nova |
2022 |
Eik-Nes TT, Tokatlian A, Raman J, Spirou D, Kvaløy K, 'Depression, anxiety, and psychosocial stressors across BMI classes: A Norwegian population study - The HUNT Study.', Frontiers in endocrinology, 13 886148 (2022) [C1]
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Nova |
2022 |
Spirou D, Raman J, Leith M, Collison J, Bishay RH, Ahlenstiel G, et al., 'The psychometric properties of the grazing questionnaire in an obesity sample with and without binge eating disorder.', Journal of eating disorders, 10 82 (2022) [C1]
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Nova |
2021 |
Chandra SS, Calvert F, Sui Z, Sartoretto A, Raman J, 'Perceived barriers and facilitators to healthy eating and physical activity in endoscopic bariatric patients: a qualitative study', EATING AND WEIGHT DISORDERS-STUDIES ON ANOREXIA BULIMIA AND OBESITY, 27 1633-1640 (2021) [C1]
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2021 |
Spirou D, Smith E, Wood K, Raman J, 'The clinical obesity maintenance model: a structural equation model', Eating and Weight Disorders, 26 1927-1937 (2021) [C1]
Purpose: Theoretical research on the psychological underpinnings of weight management is limited. Recently, the clinical obesity maintenance model (COMM) proposed a theoretical co... [more]
Purpose: Theoretical research on the psychological underpinnings of weight management is limited. Recently, the clinical obesity maintenance model (COMM) proposed a theoretical conceptualisation of salient psychological and neuropsychological mechanisms maintaining weight management issues. The current study aimed to empirically test the COMM and elucidate the results in the context of recent empirical findings. Methods: Participants (N = 165) were recruited from university and community settings in Australia. The sample consisted of adults with normal weight (n = 41), overweight (n = 40), and obesity (n = 84). Participants completed self-report questionnaires and a brief neuropsychological test. Structural equation modelling was used to estimate the associations between the hypothesised variables of the COMM and evaluate the model fit. Results: Findings suggested acceptable to good model fit. Furthermore, several direct effects were found. First, cognitive flexibility directly affected eating habit strength. Second, eating habit strength directly affected eating beliefs. Third, eating beliefs directly affected emotion dysregulation. Fourth, emotion dysregulation directly affected depression and binge eating with depression partially mediating this relationship. Finally, depression directly affected binge eating. Conclusion: This was the first study to empirically test the COMM. Overall, findings provide preliminary support for the COMM as a psychological model of weight management and highlight the underlying psychological and neuropsychological mechanisms that may contribute to weight management issues. As this study examined a simplified version of the COMM, future research should continue evaluating this model and consider incorporating these components into more holistic weight management models to improve long-term treatment outcomes. Level of evidence: V, cross-sectional descriptive study
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2021 |
Eik-Nes TT, Vrabel KA, Raman J, Clark MR, Berg KH, 'A Group Intervention for Individuals With Obesity and Comorbid Binge Eating Disorder: Results From a Feasibility Study', Frontiers in Endocrinology, 12 (2021) [C1]
Purpose: A common challenge among a subgroup of individuals with obesity is binge eating, that exists on a continuum from mild binge eating episodes to severe binge eating disorde... [more]
Purpose: A common challenge among a subgroup of individuals with obesity is binge eating, that exists on a continuum from mild binge eating episodes to severe binge eating disorder (BED). BED is common among bariatric patients and the prevalence of disordered eating and ED in bariatric surgery populations is well known. Conventional treatments and assessment of obesity seldom address the underlying psychological mechanisms of binge eating and subsequent obesity. This study, titled PnP (People need People) is a psychoeducational group pilot intervention for individuals with BED and obesity including patients with previous bariatric surgery. Design, feasibility, and a broad description of the study population is reported. Material and Methods: A total of 42 patients were from an obesity clinic referred to assessment and treatment with PnP in a psychoeducational group setting (3-hour weekly meetings for 10 weeks). Of these, 6 (14.3%) patients had a previous history of bariatric surgery. Feasibility was assessed by tracking attendance, potentially adverse effects and outcome measures including body mass index (BMI), eating disorder pathology, overvaluation of shape and weight, impairment, self-reported childhood difficulties, alexithymia, internalized shame as well as health related quality of life (HRQoL). Results: All 42 patients completed the intervention, with no adverse effects and a high attendance rate with a median attendance of 10 sessions, 95% CI (8.9,9.6) and 0% attrition. Extent of psychosocial impairment due to eating disorder pathology, body dissatisfaction and severity of ED symptoms were high among the patients at baseline. Additionally, self-reported childhood difficulties, alexithymia, and internalized shame were high among the patients and indicate a need to address underlying psychological mechanisms in individuals with BED and comorbid obesity. Improvement of HRQoL and reduction of binge eating between baseline and the end of the intervention was observed with a medium effect Conclusion: This feasibility study supports PnP as a potential group psychoeducational intervention for patients living with BED and comorbid obesity. Assessments of BED and delivery of this intervention may optimize selection of candidates and bariatric outcomes. These preliminary results warrant further investigation via a randomized control trial (RCT) to examine the efficacy and effectiveness of PnP.
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2021 |
Gilbert M, Raman J, Sui Z, 'Cognitive remediation-enabled cognitive behaviour therapy for obesity: a case series', Eating and Weight Disorders, 26 103-114 (2021) [C1]
Purpose: Despite varied treatment effects, weight recidivism is common and typically associated with the abandonment of prescribed weight management strategies. Literature suggest... [more]
Purpose: Despite varied treatment effects, weight recidivism is common and typically associated with the abandonment of prescribed weight management strategies. Literature suggests that difficulty with weight management is associated with deficits in executive functioning, in particular cognitive flexibility and response inhibition, the neurocognitive processes that are involved in goal-directed behaviours, such as dietary adherence. These processes are overlooked by mainstream weight loss programmes. The aim of the study was to assess the effectiveness of a cognitive remediation-enabled cognitive behaviour therapy (CR-CBT) in addressing the neurocognitive, psychological and behavioural correlates of weight loss. It was hypothesised that CR-CBT would improve cognitive flexibility and response inhibition, reduce binge eating, aid weight loss and improve metabolic health. Methods: Four adults with obesity (body mass index > 30¿kg/m2) received 7¿weeks of manualised CR-CBT and were assessed via a case series analysis at baseline, end of treatment and 3-month follow-up. Treatment included 3 weekly 90-min group-based behaviour weight loss sessions for 3¿weeks, followed by twice-weekly 50-min individualised CR-CBT sessions for 4¿weeks. Results: Cognitive remediation-enabled cognitive behaviour therapy produced improvements in response inhibition and cognitive flexibility, and reductions in binge eating frequency, weight, and metabolic health readings between baseline and 3-month follow-up. Conclusions: This is the first study to assess the effectiveness of CR-CBT in the treatment of obesity. Preliminary indications of treatment success are discussed with respect to study limitations. In light of these results, we recommend further investigation via a randomised control trial (RCT). Level of evidence: Level IV, case series.
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2020 |
Spirou D, Raman J, Smith E, 'Psychological outcomes following surgical and endoscopic bariatric procedures: A systematic review', OBESITY REVIEWS, 21 (2020) [C1]
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2020 |
Raman J, Spirou D, Jahren L, Eik-Nes TT, 'The Clinical Obesity Maintenance Model: A Theoretical Framework for Bariatric Psychology', FRONTIERS IN ENDOCRINOLOGY, 11 (2020) [C1]
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2020 |
Peng W, Mu Y, Hu Y, Li B, Raman J, Sui Z, 'Double Burden of Malnutrition in the Asia-Pacific Region-A Systematic Review and Meta-analysis', JOURNAL OF EPIDEMIOLOGY AND GLOBAL HEALTH, 10 16-27 (2020) [C1]
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2019 |
Cohn I, Raman J, Sui Z, 'Patient motivations and expectations prior to bariatric surgery: A qualitative systematic review', OBESITY REVIEWS, 20 1608-1618 (2019)
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2019 |
Sui Z, Raman J, Han B, Burchell T, Coogan SCP, Brennan B, Sartoretto A, 'Recent trends in intensive treatments of obesity: Is academic research matching public interest?', SURGERY FOR OBESITY AND RELATED DISEASES, 15 766-776 (2019)
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2018 |
Raman J, Hay P, Tchanturia K, Smith E, 'A randomised controlled trial of manualized cognitive remediation therapy in adult obesity.', Appetite, 123 269-279 (2018)
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2018 |
Allom V, Mullan B, Smith E, Hay P, Raman J, 'Breaking bad habits by improving executive function in individuals with obesity', BMC PUBLIC HEALTH, 18 (2018)
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2017 |
Burton AL, Hay P, Kleitman S, Smith E, Raman J, Swinbourne J, et al., 'Confirmatory factor analysis and examination of the psychometric properties of the eating beliefs questionnaire', BMC Psychiatry, 17 (2017)
Background: The Eating Beliefs Questionnaire (EBQ) is a 27-item self-report measure that assesses positive and negative beliefs about binge eating. It has been validated and its f... [more]
Background: The Eating Beliefs Questionnaire (EBQ) is a 27-item self-report measure that assesses positive and negative beliefs about binge eating. It has been validated and its factor structure explored in a non-clinical sample. This study tested the psychometric properties of the EBQ in a clinical and a non-clinical sample. Method: A sample of 769 participants (573 participants recruited from the university and general community, 76 seeking treatment for an eating disorder and 120 participating in obesity research) completed a battery of questionnaires. A subset of clinical participants with a diagnosis of Bulimia Nervosa or Binge Eating Disorder completed the test-battery before and after receiving a psychological treatment (n = 27) or after allocation to a wait-list period (n = 28), and a subset of 35 community participants completed the test battery again after an interval of two-weeks. Confirmatory Factor Analysis (CFA) was performed. Results: CFA found a two-factor structure that provided a good fit to the data, supporting the solution presented in the development paper. Items with poor psychometric properties were removed, resulting in a 16 item measure. EBQ scores were found to correlate with binge eating episode frequency, increases in body mass index (BMI), and measures of eating disorder behaviours and related psychopathology. The EBQ was found to have excellent internal consistency (a = .94), good test-retest reliability (r = .91) and sensitivity to treatment. Conclusion: These findings indicate that the EBQ is a psychometrically sound and clinically useful measure.
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2016 |
Rouel M, Raman J, Hay P, Smith E, 'Validation of the Behaviour Rating Inventory of Executive Function Adult Version (BRIEF-A) in the obese with and without binge eating disorder', Eating Behaviors, 23 58-65 (2016)
Obesity and binge eating disorder (BED) are both associated with deficiencies in executive function. The Behaviour Rating Inventory of Executive Function ¿ Adult Version (BRIEF-A)... [more]
Obesity and binge eating disorder (BED) are both associated with deficiencies in executive function. The Behaviour Rating Inventory of Executive Function ¿ Adult Version (BRIEF-A) is a self-report measure that assesses executive function. This study aimed to examine the psychometric properties of the BRIEF-A in an obese population, with and without BED, and to explore the differences on the BRIEF-A in the obese, with and without BED, compared to normative sample. 98 obese participants (70 BED) completed the BRIEF-A, DASS-21 and several performance-based measures of executive function. 30 participants completed a repeat assessment two months later. There was evidence of good internal consistency and test-retest reliability, however evidence for construct and convergent validity was mixed. Additionally, it was found that obese individuals report significantly more executive function difficulties on the BRIEF-A than the normative sample. Further, obese with BED report more executive function difficulties than those without. This study shows some evidence of sound psychometric properties of the BRIEF-A in an obese sample, however more research is required to understand the nature of executive function being measured.
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2015 |
Burton AL, Hay P, Smith E, Raman J, Swinbourne J, Touyz S, Abbott MJ, 'Investigating the clinical utility of the Eating Beliefs Questionnaire: Validity, reliability and the results of a Confirmatory Factor Analysis', Journal of Eating Disorders, 3 (2015)
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2014 |
Raman J, Hay P, Smith E, 'Manualised Cognitive Remediation Therapy for adult obesity: study protocol for a randomised controlled trial', TRIALS, 15 (2014)
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2013 |
Raman J, Smith E, Hay P, 'The clinical obesity maintenance model: an integration of psychological constructs including mood, emotional regulation, disordered overeating, habitual cluster behaviours, health literacy and cognitive function.', Journal of obesity, 2013 240128 (2013)
Psychological distress and deficits in executive functioning are likely to be important barriers to effective weight loss maintenance. The purpose of this paper is twofold. First,... [more]
Psychological distress and deficits in executive functioning are likely to be important barriers to effective weight loss maintenance. The purpose of this paper is twofold. First, in the light of recent evidence in the fields of neuropsychology and obesity, particularly on the deficits in the executive function in overweight and obese individuals, a conceptual and theoretical framework of obesity maintenance is introduced by way of a clinical obesity maintenance model (COMM). It is argued that psychological variables, that of habitual cluster Behaviors, emotional dysregulation, mood, and health literacy, interact with executive functioning and impact on the overeating/binge eating behaviors of obese individuals. Second, cognizant of this model, it is argued that the focus of obesity management should be extended to include a broader range of maintaining mechanisms, including but not limited to cognitive deficits. Finally, a discussion on potential future directions in research and practice using the COMM is provided.
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