Atwood_Molly.pdf (1.71 MB)

The Bariatric Interprofessional Psychosocial Assessment Of Suitability Scale (BIPASS): Predictive Validity for Outcomes 1 And 2 Years Following Bariatric Surgery

Download (1.71 MB)
thesis
posted on 22.05.2021, 08:37 by Molly Atwood
Bariatric surgery is the most effective intervention for severe obesity; however, many patients demonstrate insufficient and/or unsustained weight loss, and unsatisfactory psychosocial functioning in the longer-term. Although it is well established that attendance at postsurgical follow-up appointments is integral to sustained weight loss, nonadherence to follow-up is common. Consequently, presurgical psychosocial evaluations are conducted in order to identify patients at high risk of poor outcomes. Yet, no consensus has been established regarding a standardized protocol for the assessment of variables relevant to surgical outcomes, and bariatric programs vary widely in their interpretation of psychosocial risk. In addition, there is a paucity of research examining the predictive utility of psychosocial evaluations. The Bariatric Interprofessional Psychosocial Assessment of Suitability Scale (BIPASSTM), a novel psychosocial evaluation tool, was developed to address these issues. The purpose of the present study was to contribute to the validation of the BIPASS tool via two aims: 1) by examining the psychometric properties of the BIPASS, and; 2) by examining the ability of the BIPASS tool to predict outcomes 1 and 2 years following bariatric surgery, including weight loss and weight regain, quality of life, psychiatric symptoms, and adherence to postsurgical follow-up appointments. The BIPASS was applied retrospectively to the charts of 200 consecutively referred patients of the Toronto Western Hospital Bariatric Surgery Program (TWH-BSP). Factor analysis of BIPASS items revealed a two-factor structure, reflecting “Mental Health” and “Patient Readiness” subscales. Internal consistency for the BIPASS Total and subscale scores ranged from poor to good, and inter-rater reliability was excellent. Higher BIPASS scores significantly predicted higher binge eating symptomatology, and lower physical and mental health-related quality of life at 1 year postsurgery. The BIPASS did not predict any outcome variables at 2 years postsurgery, or adherence to postsurgical follow-up appointments. Findings suggest that the BIPASS can be used to identify patients at increased risk of problematic eating and poor health-related quality of life early in the postsurgical course, thereby facilitating appropriate interventions.

History

Language

eng

Degree

Doctor of Philosophy

Program

Psychology

Granting Institution

Ryerson University

LAC Thesis Type

Dissertation

Thesis Advisor

Stephanie Cassin