PMID- 23868457 OWN - NLM STAT- MEDLINE DCOM- 20140912 LR - 20240413 IS - 1573-2649 (Electronic) IS - 0962-9343 (Print) IS - 0962-9343 (Linking) VI - 23 IP - 1 DP - 2014 Feb TI - Cognitive interviewing of the US National Cancer Institute's Patient-Reported Outcomes version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE). PG - 257-69 LID - 10.1007/s11136-013-0470-1 [doi] AB - PURPOSE: The National Cancer Institute's Patient-Reported Outcomes version of the Common Terminology Criteria for Adverse Events (PRO-CTCAE) is a library of question items that enables patient reporting of adverse events (AEs) in clinical trials. This study contributes content validity evidence of the PRO-CTCAE by incorporating cancer patient input of the relevance and comprehensiveness of the item library. METHODS: Cognitive interviews were conducted among patients undergoing chemotherapy or radiation therapy at multiple sites to evaluate comprehension, memory retrieval, judgment, and response mapping related to AE terms (e.g., nausea), attribute terms (regarding frequency, severity, or interference), response options, and recall period. Three interview rounds were conducted with >/=20 patients completing each item per round. Items were modified and retested if >/=3 patients exhibited cognitive difficulties or if experienced by