Costs and benefits of bariatric surgery - Use of health and social services by patients with severe obesity

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00038918

Enrollment

197

Registered

2026-02-06

Start date

2026-02-19

Completion date

Unknown

Last updated

2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

E66

Interventions

Group 1: Formerly severely obese patients who underwent bariatric surgery between September 2015 and June 2018 will be surveyed once using a modified version of the Client Sociodemographic and Service

Eligibility

Sex/Gender

All

Age

18 Years to 65 Years

Inclusion criteria

Inclusion criteria: preoperative body mass index (BMI) above 35 kg/m², indicating an obesity grade of 2 or 3

Exclusion criteria

Exclusion criteria: - insufficient German language skills - intellectual disability - developmental or learning disorders - history of prior bariatric surgery - current substance abuse

Design outcomes

Primary

Measure	Time frame
Costs in euros incurred by the health and social care system as a result of the services used. The services are determined using the Client Sociodemographic Service Receipt Inventory (CSSRI, modified version) and the associated costs are determined on the basis of relevant cost registers. The costs are to be compared between the groups (arm 1 and arm 2). In addition, the return on investment (ROI) ratio for bariatric surgery is to be determined based on the cost difference between the groups. The parameters are collected once for arm 1 7.5 to 10 years after surgery and once for arm 2 before surgery.	—

Measure

Time frame

Costs in euros incurred by the health and social care system as a result of the services used. The services are determined using the Client Sociodemographic Service Receipt Inventory (CSSRI, modified version) and the associated costs are determined on the basis of relevant cost registers. The costs are to be compared between the groups (arm 1 and arm 2). In addition, the return on investment (ROI) ratio for bariatric surgery is to be determined based on the cost difference between the groups. The parameters are collected once for arm 1 7.5 to 10 years after surgery and once for arm 2 before surgery.

—

Secondary

Measure	Time frame
- Health-related quality of life and, if applicable, quality-adjusted life years (QALYs), using the EQ-5D-5L - Binge eating disorder according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) - Night eating syndrome, according to the research criteria of Allison et al. (2010) - Snacking or nibbling according to Eating Disorder Examination (EDE), German translation, 2nd edition The parameters are collected once for arm 1 7.5 to 10 years after surgery and once for arm 2 before surgery.	—

Measure

Time frame

- Health-related quality of life and, if applicable, quality-adjusted life years (QALYs), using the EQ-5D-5L - Binge eating disorder according to the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition (DSM-5) - Night eating syndrome, according to the research criteria of Allison et al. (2010) - Snacking or nibbling according to Eating Disorder Examination (EDE), German translation, 2nd edition The parameters are collected once for arm 1 7.5 to 10 years after surgery and once for arm 2 before surgery.

—

Countries

Germany

Contacts

Public ContactShalina Vierhock

Universität Hildesheim

vierhocks@uni-hildesheim.de+ 49 5121 883 12254

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Apr 4, 2026