Content validity of the EORTC quality of life questionnaire QLQ-C30 for use in cancer

Also consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. The European Organization for Research and Treatment of Cancer QLQ-C30: A Quality-of-Life Instrument for Use in International Clinical Trials in Oncology· 1993 · 15,917 citations
2. Content Validity—Establishing and Reporting the Evidence in Newly Developed Patient-Reported Outcomes (PRO) Instruments for Medical Product Evaluation: ISPOR PRO Good Research Practices Task Force Report: Part 2—Assessing Respondent Understanding· 2011 · 1,132 citations
3. What Is the Value of the Routine Use of Patient-Reported Outcome Measures Toward Improvement of Patient Outcomes, Processes of Care, and Health Service Outcomes in Cancer Care? A Systematic Review of Controlled Trials· 2014 · 977 citations
4. How Many Interviews Are Enough?· 2005 · 19,272 citations
5. Telephone Versus face-to-face Interviews for Patient-Reported Outcome Instrument Development· 2015 · 10 citations