A trial-based EuroQol EQ-5D health utility analysis in patients with classical Hodgkin lymphoma.

Abstract

e19011 Background: Pembrolizumab has shown a high response in patients classic Hodgkin lymphoma (cHL) patients who have experienced disease progression after brentuximab vedotin in KEYNOTE (KN)-087 and the results have been presented. This study aimed to evaluate the health-related quality of life (HRQoL) of the trial patients in KN087. Methods: KN-087 is an ongoing single-arm multi-center, non-randomized Phase II trial evaluating pembrolizumab 200mg Q3W IV in patients with relapsed or refractory cHL. In KN-087, HRQoL data were collected at baseline and every drug administration over the 18 months of follow-up. HRQoL was assessed using both the EQ-5D and EORTC QLQ-C30 instruments. The generic health statuses assessed from both instrument were converted to population-based utility values using published algorithms. More specifically, US-based scoring was applied to US patients, UK-based scoring for UK patients and EU-based scoring for all other patients. HRQoL was reported by status of respond and disease progression. Response was defined based upon IWG criteria. Furthermore, stratified analyses were conducted to examine the health disabilities of the patients who experienced grade 3+ adverse events (AEs), and by ECOG performance and the number of prior therapies. Results: Among 210 trial patients, HRQoL data were collected for 205 patients at baseline and the mean health utility score was 0.759 (95% CI 0.730-0.788). Mean health utility score among responders and non-responders was 0.826 (95% CI 0.811-0.842) and 0.760 (95% CI 0.718-0.801), respectively. The difference is considered clinically significant. Mean utility decreased from 0.820 (95% CI 0.807-0.833) for time spent prior to progression to 0.806 (95% CI 0.780-0.832) post disease progression. Progression-free patients who experienced grade 3+ AEs (N=17) had a mean health utility of 0.736 (95% CI 0.662-0.811), compared with 0.825 (95% CI 0.811-0.838) among those did not. Conclusions: The results showed a substantial HRQoL impact of R/R cHL. Treatment response was associated with significant clinically meaningful improvement in HRQoL. The utility estimates from the study are important for economic evaluations of treatments in R/R cHL patients. Clinical trial information: NCT02453594.