title: The impact of psychological support on weight loss post weight loss surgery: a randomised control trial.
abstract: BACKGROUND
  The purpose of the present study is to evaluate the impact of a health psychology-led bariatric rehabilitation service (BRS) on patient weight loss following bariatric surgery at 1 year.
  
  
  METHODS
  A single-site open-randomised parallel group control trial based at St. Richard's Hospital in Chichester in the UK. Patients (n = 162) were recruited immediately prior to Roux-en-Y gastric bypass and randomly allocated to receive either treatment as usual (n = 80) or the BRS (n = 82). The BRS involved three 50-min one-to-one sessions with a health psychologist and provided information, support and mentoring pre and post surgery addressing psychological issues such as dietary control, self esteem, coping and emotional eating. Weight loss was assessed at 1 year. The key outcome variable was BMI and change in BMI.
  
  
  RESULTS
  Follow-up weight was available for 145 patients. Intention-to-treat analysis (n = 162) using last measured weights showed that mean change in BMI by 1 year post surgery was -16.49. There was no significant difference between the two groups (control group = -16.37, 95 % CI = 15.15-17.57; intervention = -16.6, 95 % CI = 15.42-17.81; η p (2) = 0.001). Similarly, explanatory analysis (n = 145) showed a mean change in BMI of -17.17. The difference between the two groups was not significant (control group = -16.9, 95 % CI = 15.78-18.18; intervention = -17.35, 95 % CI = 18.5-16.16; η p (2) = 0.001).
  
  
  CONCLUSIONS
  Psychological support pre and post bariatric surgery had no impact on weight loss as measured by BMI and change in BMI by 1 year. It is argued that psychological support should be targeted to patients who start to demonstrate weight regain at a later stage.
  
  
  BACKGROUND
  ClinicalTrials.gov NCT01264120.
authors.affiliation: Department of Psychology, University of Surrey, Guildford, GU2 7XH, UK, J.Ogden@surrey.ac.uk.
authors.forename: Jane
authors.initials: J
authors.lastname: Ogden
authors.forename: Amelia
authors.initials: A
authors.lastname: Hollywood
authors.forename: Christopher
authors.initials: C
authors.lastname: Pring
mesh_terms: D000223:Adaptation, Psychological; D000293:Adolescent; D000328:Adult; D000368:Aged; D003376:Counseling; D005260:Female; D015390:Gastric Bypass / Q000523:psychology / Q000534:rehabilitation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000523:psychology* / Q000534:rehabilitation* / Q000601:surgery*; D011184:Postoperative Period; D012944:Social Support; D015431:Weight Loss; D055815:Young Adult