• Beth A Fordham, Cicely Kerr, Hayley M de Freitas, Andrew J Lloyd, Karissa Johnston, Corey L Pelletier, Gabriel Tremblay, Anna Forsythe, Bryan McIver, and Ezra Ew Cohen.
• ICON Patient Reported Outcomes, Oxford, UK.
• Patient Prefer Adher. 2015 Jan 1; 9: 156115721561-72.

PurposeThe aim of this study was to elicit utilities for radioactive iodine-refractory differentiated thyroid cancer (RR-DTC) and evaluate the impact of treatment response and toxicities on quality of life.Patients And MethodsRR-DTC health states were developed based on data from a previous qualitative study and iterative review by clinical experts. Following piloting, health states underwent valuation by 100 members of the UK public during time trade-off interviews. Mean utilities and descriptive distribution statistics were calculated, and a logistic regression analysis was conducted.ResultsThe demographic characteristics of the study sample were generally reflective of the UK population. Clear differentiation in valuation between health states was observed. No response/stable disease had an adjusted utility value of 0.87, with a corresponding gain of +0.04 following a treatment response and a decline of -0.35 for disease progression. Adverse events were associated with utility decrements between -0.47 (grade III diarrhea) and -0.05 (grade I/II alopecia).ConclusionThe trade-off interviews derived utility weights show clear differentiation between RR-DTC health states in response to treatment. The values reported in this study are suitable for cost-effectiveness evaluations for new treatments in RR-DTC.

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