PATIENT BENEFIT-RISK PREFERENCES FOR ADVANCED RENAL CELL CARCINOMA TREATMENTS- RESULTS FROM A CONJOINT ANALYSIS STUDY
Author(s)
Mohamed A1, Yang JC1, Hauber AB1, Liu Z2, Wong M3, Rogerio J2, Garay C21RTI Health Solutions, Research Triangle Park, NC, USA, 2Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA, 3University of Southern California, Los Angeles,, CA, USA
OBJECTIVES: To quantify patients’ benefit-risk preferences for benefits, toxicities, and serious adverse events of advanced RCC treatments. METHODS: Adult residents in the United States, with a self-reported diagnosis of RCC completed a web-enabled choice-format conjoint survey consisting of a series of 10 treatment-choice questions, and a pair of hypothetical RCC medication profiles. Each profile had different attributes, i.e., efficacy [PFS], tolerability [fatigue, stomach problems, mouth sores, hand-foot syndrome (HFS)], serious adverse events (lung damage and liver failure), and mode of administration. Treatment-choice questions were based on a predetermined experimental design with known statistical properties. Random-parameters logit was used to estimate relative preference weights for each attribute level, mean relative importance weights; and calculate risk tolerance for each adverse event for different improvements in PFS. RESULTS: A total of 272 respondents completed the survey. A 7-month improvement in PFS was the most important attribute. Remaining attributes were ranked in decreasing order of importance: eliminating severe fatigue (7.0; 95% CI: 4.6-9.4), eliminating severe stomach problems (7.0; 95% CI: 4.7-9.3), eliminating a 2% liver-failure risk (6.1; 95% CI: 4.0-8.2), eliminating severe mouth sores (5.7; 95% CI: 3.7-7.7), eliminating severe HFS (4.5; 95% CI: 2.7-6.4), eliminating a 2% lung-damage risk (4.1; 95% CI: 2.5-5.8), and switching from infusion once a week to 1 pill once a day (2.5; 95% CI: 1.4-3.6). To increase PFS by 1 month (baseline: 3 - 4 months), patients accepted a maximum level of lung damage risk of 1.0% (95% CI: 0.8% - 1.4%) and liver failure risk of 0.7% (95% CI: 0.4% - 1.0%). A 7-month improvement in PFS was 2 times as important as eliminating severe HFS and a 2.0% risk of lung damage (P <0.05). CONCLUSIONS: PFS was the most important outcome for RCC patients while severe fatigue and severe stomach problems were rated as the most troublesome toxicities.
Conference/Value in Health Info
2012-06, ISPOR 2012, Washington, D.C., USA
Value in Health, Vol. 15, No. 4 (June 2012)
Code
PCN155
Topic
Methodological & Statistical Research
Topic Subcategory
PRO & Related Methods
Disease
Oncology