The Quality of Life for Obesity Surgery-Revised (QOLOS-R) questionnaire for the assessment of health-related quality of life prior to and following bariatric surgery

The Quality of Life for Obesity Surgery-Revised (QOLOS-R) questionnaire for the assessment of health-related quality of life prior to and following bariatric surgery - QOLOS-R

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00016677

Enrollment

600

Registered

2019-02-11

Start date

2019-04-08

Completion date

Unknown

Last updated

2025-04-07

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

Conditions

E66.01 F50.9 E66.06 F50.8

Interventions

Group 1: This prospective longitudinal study will be addressing the specific health-related quality of life of patients with grade 2/3 obesity undergoing bariatric surgery (Roux-en-Y gastric bypass, o

Eligibility

Sex/Gender

All

Age

18 Years to 80 Years

Inclusion criteria

Inclusion criteria: Adult bariatric surgery candidates with grad 2/3 obesity, 18 years or older

Exclusion criteria

Exclusion criteria: insufficient German language skills, cognitive impairments, psychosis

Design outcomes

Primary

Measure	Time frame
Bariatric surgery specific health-related quality of life (HRQoL) using the Quality of Life for Obesity Surgery-Revised questionnaire (QOLOS-R); 4 assessments: t0 = prior to surgery, t1 = 6 months following surgery, t2 = 12 months following surgery, t3 = 24 months following surgery	—

Secondary

Measure	Time frame
Symptoms of eating disorders (Eating Disorder Examination-Questionnaire, EDE-Q), Food addiction (Yale Food Addiction Scale 2.0, YFAS 2.0), anxiety and Depression (Hospital Anxiety and Depression Scale, HADS), self-harm (Self Harm Inventory, SHI), alcohol use disorder (Alcohol Use Disorders Identification Test, AUDIT), dumping (Sigstad Dumping Score) 4 assessments: t0 = prior to surgery t1 = 6 months following surgery t2 = 12 months following surgery t3 = 24 months following surgery	—

Measure

Time frame

Symptoms of eating disorders (Eating Disorder Examination-Questionnaire, EDE-Q), Food addiction (Yale Food Addiction Scale 2.0, YFAS 2.0), anxiety and Depression (Hospital Anxiety and Depression Scale, HADS), self-harm (Self Harm Inventory, SHI), alcohol use disorder (Alcohol Use Disorders Identification Test, AUDIT), dumping (Sigstad Dumping Score) 4 assessments: t0 = prior to surgery t1 = 6 months following surgery t2 = 12 months following surgery t3 = 24 months following surgery

—

Countries

Germany

Contacts

Public ContactMelanie Pommnitz

Medizinische Hochschule Hannover Klinik für Psychosomatik und Psychotherapie

pommnitz.melanie@mh-hannover.de+49 511 532 6569

Outcome results

None listed

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