Table 1 Study eligibility criteria for the literature review of validated questionnaires

Study design

Any study validating a disease-specific questionnaire measuring quality of life, health-related quality of life, or well-being

Population

Adults with a diagnosis of: cholangiocarcinoma, gallbladder cancer, colorectal cancer, hepatocellular carcinoma, inflammatory bowel disease, liver disease, pancreatitis

Outcomes

Quality of life issues included in the questionnaire items

Exclusions

• Conference abstracts

• Studies of questionnaires which focused on a single domain of quality of life (e.g. work productivity or itch)

• Studies which did not include patients in the development of the questionnaire

• Non-English language papers

• Validation of identified tools in further languages

• Studies which included children and adolescents (< 18 years)