P960: HEALTH-RELATED QUALITY OF LIFE IN THE LOCOMMOTION STUDY OF REAL-LIFE CURRENT STANDARD OF CARE IN PATIENTS WITH RELAPSED/REFRACTORY MULTIPLE MYELOMA

Abstract

Background: Assessment of patient-reported outcomes (PRO) can inform how real-life standard of care (SOC) treatments affect health-related quality of life (HRQoL) for patients with relapsed/refractory multiple myeloma (RRMM). We present measures of symptoms, functioning, and overall HRQoL from LocoMMotion (NCT04035226), the first prospective, multinational study of real-life SOC in triple-class exposed patients with RRMM. Aims: To assess HRQoL in patients with RRMM receiving real-life current SOC in the LocoMMotion study. Methods: All patients provided informed consent. LocoMMotion is a noninterventional study across 76 sites (63 Europe, 13 United States) in patients who had received ≥3 prior lines of therapy (LOT) or were refractory to proteasome inhibitor (PI) and immunomodulatory drug (IMiD). Patients received PI, IMiD, and anti-CD38 monoclonal antibody and had disease progression during/after their last LOT. Real-life SOC treatments were defined as those used in local clinical practice. The following questionnaires were used: European Organisation for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30), 4 single items from EORTC QLQ-myeloma-specific module (EORTC QLQ-MY20), and EuroQol 5-Dimension 5-Level (EQ 5D-5L). HRQoL data were collected at baseline (BL), day 1 of each treatment cycle, end of treatment visit, and during follow-up (every 4 weeks). Established thresholds were used to evaluate improvement compared with BL health status. Mixed models for repeated measures were used to assess within-group change. Results: The questionnaire completion rate was 75.6% during SOC treatment in the LocoMMotion study (N=248; male: 54.4%; median age: 68 years; median cycles of SOC: 4.0 [range: 1-20]). Most patients did not achieve meaningful improvement (defined by a literature-based minimally important difference of 10 points in mean score) in PRO scores. This was most pronounced in pain symptoms, with 62% of patients showing no meaningful improvement during the first 3 months of treatment and 55% showing no improvement during the full treatment duration. Least square (LS) mean changes from BL during SOC treatment and subsequent LOT for the overall population are described (Table). Patients with ≥very good partial response during SOC treatment showed greater improvement in PRO scores, including LS mean change for pain score (-14.9 [95% confidence interval: -22.9, -7.0]). Image:Summary/Conclusion: This first prospective study of real-life current SOC in triple-class exposed patients with RRMM reported limited gains in HRQoL, most notably in pain symptoms. There is an urgent and unmet need for therapies that lead to deep responses and delayed disease progression, as these are associated with improvements in HRQoL.