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Evaluating the psychological predictors of long term weight loss following bariatric surgery.

Lanham, Ann Catherine (2015) Evaluating the psychological predictors of long term weight loss following bariatric surgery. D.Clin.Psychol thesis, University of Leeds.

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Introduction: Weight loss surgery (WLS) is cost effective for managing obesity. Yet nearly a third of patients do not achieve successful weight loss (WL) long-term. Furthermore identifying psychological characteristics of long-term successful WL, remain largely undetermined. Aims: To examine the psychological and WL outcomes of patients who had WLS 2-10 years ago and to identify which preoperative and/or postoperative psychological factors might predict successful WL long term. Method: 24 patients, who had undergone WLS 2-10 years ago, participated. Two data sets were used: (1) retrospective data from participants’ medical records on their surgical procedure, physical and psychological health before and after surgery and (2) follow-up data from eight questionnaires, on postoperative psychological functioning, eating behaviours, physical health and adherence to professional support. Results: Participants were predominantly female (n=19), had undergone Roux–en–Y gastric bypass (RYGB, n=19), on average four years prior to follow-up. Mean postoperative WL was 41kg (SD = 18.47) and two thirds of participants (n =16) achieved more than 25% WL. Fifty per cent had a probable anxiety disorder, a third were hazardously drinking alcohol and most had weight related quality of life concerns. RYGB patients with successful WL (n=14) had significantly fewer disordered eating symptoms (p < 0.005), than the unsuccessful WL group (n=5). Disordered eating symptoms also significantly correlated with %WL, even after controlling for years since surgery (F(2,16) = 5.77, p < 0.013.). The relationship between preoperative psychological factors and %WL was not determined due to a lack of data in the medical records. Conclusion: While WLS is successful in reducing obesity, it is unclear whether the presence of postoperative psychological difficulties in this sample is a consequence of this procedure. Further research is required to determine if key psychological characteristics can predict %WL.

Item Type: Thesis (D.Clin.Psychol)
Keywords: Bariatric surgery, weight loss surgery, psychological functioning, substance misuse, disordered eating
Academic Units: The University of Leeds > Faculty of Medicine and Health (Leeds) > Institute of Health Sciences (Leeds) > Academic Unit of Psychiatry and Behavioural Sciences (Leeds)
Identification Number/EthosID: uk.bl.ethos.674997
Depositing User: miss ann lanham
Date Deposited: 02 Dec 2015 13:42
Last Modified: 26 Apr 2016 15:43
URI: http://etheses.whiterose.ac.uk/id/eprint/10739

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