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Title: Evaluating the psychological predictors of long term weight loss following bariatric surgery
Author: Lanham, Ann Catherine
ISNI:       0000 0004 5370 4060
Awarding Body: University of Leeds
Current Institution: University of Leeds
Date of Award: 2015
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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.
Supervisor: Dye, Louise ; Lawton, Clare Sponsor: Not available
Qualification Name: Thesis (D.Clin.Psy.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available