{Reference Type}: Journal Article {Title}: Development and testing of a lymphoma clinical trial-specific frailty index: a secondary analysis of the NCIC-CTG LY.12 clinical trial. {Author}: Vijenthira A;Li X;Crump M;Hay AE;Shepherd L;Meyer RM;Djurfeldt M;Chen BE;Prica A; {Journal}: Leuk Lymphoma {Volume}: 0 {Issue}: 0 {Year}: 2024 Jul 9 Ꚃꗠ{DOI}: 10.1080/10428194.2024.2370437 {Abstract}: The prevalence of frailty in clinical trials of lymphoma is unknown. We conducted a secondary analysis of the phase III LY.12 trial in which patients with relapsed aggressive non-Hodgkin lymphoma were randomized to different salvage regimens before autologous stem cell transplant. The primary objective was to construct a lymphoma clinical trials-specific frailty index (LyFI) using previously described methods. The secondary objective was to describe the association of frailty withover all and event-free survival (OS, EFS). The LyFI was constructed using 619 patients, and11% (Nā€‰=ā€‰70) were classified as frail. Frailty was associated with EFS (HR 1.94, 95%CI 1.53-2.46) and OS (HR 2.01, 95%CI 1.57-2.58) in univariable analysis, but was only significant as a continuous (not binary) variable in multivariable analysis controlling for prognostic score, suggesting limitations of a FI in this trial population. Future work could validate the FI using clinical assessments and/or apply it to an older trial population.