OBSS - Oslo Bariatric Surgery Study
The Oslo Bariatric Surgery Study (OBSS) is a 10-year longitudinal, prospective cohort study of 302 men and women who underwent bariatric surgery at Aker Hospital. Data was collected pre-surgery, 1-year, 3-years, 5-years, and 10-years after surgery.
5-year follow-up: Physical activity
The main aim of this project is to examine long-term modifiable postoperative predictors of changes in recommended energy balance behaviors relevant for weight loss outcomes after bariatric surgery. Data are based on assessment during clinical follow-up, journal data, questionnaire data, and objectively assessed physical activity by Actigraph. The study is funded by South-Eastern Norway Regional Health Authority. Contact person Christine Sundgot-Borgen.
Publications based on the 5-year follow-up data:
Sundgot-Borgen C, Bond DS, Sniehotta FF, Kvalem IL, Hansen BH, Bergh I, Rø Ø, Mala T (2023). Associations of changes in physical activity and sedentary time with weight recurrence after bariatric surgery: a 5-year prospective study. Int J Obes (Lond), 47 (6), 463-470. DOI 10.1038/s41366-023-01284-7, PubMed 36828898
Christine Sundgot-Borgen, Dale S Bond, Øyvind Rø, Falko Sniehotta, Jon Kristinsson, Ingela Lundin Kvalem. Associations of adherence to physical activity and dietary recommendations with weight recurrence 1-5 years after metabolic and bariatric surgery. Surgery for Obesity and Related Diseases. (Accepted, 2023).
Mapping Disordered Eating 10 years following Bariatric Surgery
Few studies have examined the long-term course and development of post-operative maladaptive eating behaviors, and data is sorely needed to allow for a comprehensive understanding of the persistence, onset, course, and prognostic significance of the presence of maladaptive eating behaviors following bariatric surgery. However, an improved understanding of clinically relevant presentations of maladaptive forms of eating that may appear following surgery can help inform the development of treatment guidelines for the post-operative management of individuals following surgery. The proposed study, herein titled OBSS- EAT, will prospectively investigate disordered presentations of eating (loss of control eating, binge-eating, grazing, food addiction, unhealthy compensatory methods such as vomiting) using data from the Oslo Bariatric Surgical Study. The main aim is to characterize post-surgical disordered eating behaviors and to assess the concurrent and predictive associations with psychosocial and weight outcomes at a 10-year follow-up. Contact person Deborah Lynn Reas
OBSS cognitive: A Prospective Study on Bariatric Surgery and Cognitive Function
The OBSS Cognitive is a collaboration between researchers, clinicians, and surgeons at Oslo University Hospital (Ullevål and Aker) and Oslo University. The study aimed to investigate how cognitive functioning effects and is affected by bariatric surgery in patients undergoing surgery at the Centre for Morbid Obesity, Aker hospital. The study was funded through a PhD research grant from Health South-East. The PhD candidate, Gro Walø-Syversen, defended her doctoral work at Oslo University in September 2021 and the project has been finalized.
Publications from OBSS cognitive:
Walø-Syversen G, Kvalem IL, Kristinsson J, Eribe IL, Rø Ø, Brunborg C, Dahlgren CL (2021). Visual, Verbal and Everyday Memory 2 Years After Bariatric Surgery: Poorer Memory Performance at 1-Year Follow-Up. Front Psychol, 11, 607834. DOI 10.3389/fpsyg.2020.607834, PubMed 33488469
Walø-Syversen G, Kvalem IL, Kristinsson J, Eribe IL, Rø Ø, Brunborg C, Lindvall Dahlgren C (2020). Preoperative inhibitory control predicts weight loss 1 year after bariatric surgery. Eur Eat Disord Rev, 29 (1), 123-132. DOI 10.1002/erv.2801, PubMed 33125194
Walø-Syversen G, Kvalem IL, Kristinsson J, Eribe IL, Rø Ø, Dahlgren CL (2019). Executive Function, Eating Behavior, and Preoperative Weight Loss in Bariatric Surgery Candidates: An Observational Study. Obes Facts, 12 (5), 489-501. DOI 10.1159/000502118, PubMed 31505516
Other publications based on the OBSS data collection:
Johansen, Judita og Alshus, Ingvild (May, 2018). Spiseatferd og psykisk helse hos fedmekirurgipasienter [Eating behavior and mental health among bariatric surgery patients]. Hovedoppgave i klinisk psykologi. Co-supervisors: Ingela Lundin Kvalem, Deborah Lynn Reas.
Aouad P, Stedal K, Walø-Syversen G, Hay P, Lindvall Dahlgren C (2021). Chew and spit (CHSP) in bariatric patients: a case series. J Eat Disord, 9 (1), 89. DOI 10.1186/s40337-021-00441-5, PubMed 34289898