Table 4.

Summary of EORTC QLQ-C30/PAN26 cognitive debriefing findings

Consideration	Findings
Conceptual relevance	• All items deemed relevant by patients • Most key symptom/side effect and impact concepts assessed, although some side effect assessments are missing (e.g. neuropathic symptoms)
Interpretation and understanding	• Instructions well understood Items generally well understood. Potentially problematic items included those assessing a ‘long’ or ‘short’ walk and ‘frequent bowel movements’
Response scale and options	• Mostly considered appropriate
Recall period	• Recall applied for Items 1–5 varied, due to absence of a specified recall period • The recall period of the remaining items was easily understood but not always adhered to throughout completion of questionnaire