In this study, the health impacts of improving access to treatment with axicabtagene ciloleucel (axi-cel) was assessed in patients with relapsed/refractory diffuse large B-cell lymphoma after ≥2 lines of therapy in Spain. A partitioned survival mixture cure model was used to estimate the lifetime accumulated life years gained (LYG) and quality-adjusted life years (QALYs) per patient treated with axi-cel versus chemotherapy. Efficacy data were extracted from the ZUMA-1 trial for axi-cel and from the SCHOLAR-1 study for chemotherapy. In the base case, the incremental outcomes of axi-cel versus chemotherapy were evaluated in a cohort of 187 patients treated with CAR T-cell therapies, as reported by the “Spanish National Health System Plan for Advanced Therapies”, and in the alternative scenario in the full eligible population based on epidemiological estimates (n = 490). Taking those currently treated with axi-cel, compared with chemotherapy, axi-cel provided an additional 1341 LYGs and 1053 QALYs. However, when all eligible patients (n = 490) were treated, axi-cel provided an additional 3515 LYs and 2759 QALYs. Therefore, if all eligible patients were treated with axi-cel rather than those currently treated as per the registry (n = 187), there would have been an additional 303 patients treated, resulting in an additional 2173 LYGs and 1706 QALYs in total. The lack of access in Spain has led to a loss of a substantial number of LYGs and QALYs, and efforts should be made to improve access for all eligible patients.
本研究评估了西班牙在≥2线治疗后复发/难治性弥漫性大B细胞淋巴瘤患者中,提高阿基仑赛(axi-cel)治疗可及性对健康的影响。采用分区生存混合治愈模型,估算接受axi-cel治疗与化疗患者相比,终生累积获得的生命年(LYG)和质量调整生命年(QALYs)。疗效数据来源于ZUMA-1试验(axi-cel)和SCHOLAR-1研究(化疗)。基础案例分析中,根据《西班牙国家卫生系统先进疗法计划》报告的187例接受CAR-T细胞治疗患者队列,评估axi-cel相较于化疗的增量效益;替代情景则基于流行病学估算的全部符合条件人群(n=490)进行分析。在当前接受axi-cel治疗的患者中,与化疗相比,axi-cel额外提供了1341个LYG和1053个QALYs。然而,当所有符合条件患者(n=490)均接受治疗时,axi-cel可额外提供3515个LYG和2759个QALYs。因此,若所有符合条件患者均能接受axi-cel治疗(而非当前登记治疗的187例),将新增303例治疗患者,总计额外获得2173个LYG和1706个QALYs。西班牙当前治疗可及性的不足已导致大量LYG和QALYs的损失,应着力提升所有符合条件患者的治疗可及性。
The Health Impacts of Better Access to Axicabtagene Ciloleucel: The Case of Spain