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© 1999 American Society for Clinical Oncology Subjective and Objective Prospective, Long-Term Analysis of Quality of Life During Inhaled Interleukin-2 ImmunotherapyFrom the Department of Urology, University of Hamburg, and University Clinic Eppendorf, Hamburg, Germany. Address reprint requests to Hans Heinzer, MD, Department of Urology, University Clinic Eppendorf, Martinistr 52, 20246 Hamburg, Germany; email heinzer{at}uhr.uni-hamburg.de PURPOSE: We conducted both a subjective and objective, prospective quality-of-life analysis during high-dose (36 x 106 immunizing units/d) inhalational interleukin (IL)-2 treatment (mean treatment time, 13.4 months) of 15 patients with metastatic renal cell carcinoma (mRCC). Additionally, quality of life for 10 patients with mRCC receiving low-dose (9 x 106 IU/m2/d for 5 days) intravenous IL-2 treatment also was evaluated. PATIENTS AND METHODS: Patients responded to the European Organization for Research and Treatment of Cancer quality-of-life questionnaire QLQ-C30 before and during inhalational IL-2 treatment at 1, 3, 6, 9, and 12 months and before and once during intravenous IL-2 treatment. A clinician assessed patient well-being using the Quality of Well-Being scale to calculate once weekly quality-adjusted life-years (QALYs) during inhalational IL-2 treatment. RESULTS: Patients completed 103 questionnaires and clinicians performed 892 QALY calculations. For patients treated with inhalational IL-2, the mean quality-of-life score deteriorated modestly but significantly 1 month after treatment initiation (15.1%, P = .01) but did not differ significantly from pretreatment scores after 3, 6, 9, and 12 months of treatment. Inhalational IL-2 therapy stabilized patient quality of life for a mean of 13.4 months. The resulting QALY calculation for patients on inhalation IL-2 was 70.1% of 13.4 months, representing 9.4 months of QALY. In comparison, patients who received intravenous IL-2 showed a more marked, statistically significant deterioration in mean quality-of-life score during treatment (27%, P = .006); moreover, three of these 10 patients experienced treatment-related toxicity that prevented questionnaire completion. CONCLUSION: Quality-of-life analysis during immunotherapy provides valuable information regarding cancer treatment outcomes. Financial disclosure: H.H., T.S.M., E.H., and H.H. do not own stock or options in Chiron Therapeutics but have received research support from Chiron Therapeutics.
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Copyright © 1999 by the American Society of Clinical Oncology, Online ISSN: 1527-7755. Print ISSN: 0732-183X
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