Impact of eligibility criteria discordance on clinical trial accrual in diffuse large B-cell lymphoma (DLBCL)
Abstract
e13707 Background: Excessively stringent clinical trial eligibility criteria may hinder trial accrual, differentially exclude racial-ethnic minority groups, and limit generalizability. This study reviewed the association between trial accrual and concordance of eligibility criteria with known drug safety data in DLBCL clinical trials. Methods: Eligibility criteria and accrual of completed phase II/III clinical trials for DLBCL that opened in the US between 2010-2020 were abstracted from ClinicalTrials.gov. Trials missing posted results or studying cellular therapy / transplant were excluded. Concordance with known safety data was assessed by comparing study eligibility criteria for QTc, renal, hepatic, and cardiac function to FDA labels and phase I safety signals of study drugs. Excessively strict discordant criteria (ExSDC) were defined as eligibility criteria without supporting safety signals. Logistic regression +/- dispersion was used for analysis. Results: 58 trials met criteria for inclusion, accruing 6,232 participants. 88% of studies involved a non-FDA-approved agent, 74% were multicenter, 55% were industry sponsored, 66% only accrued in the US, and 86% were phase II. Eligibility criteria were highly variable (Table). Discordance of renal, hepatic, cardiac function, and QTc criteria from known safety data occurred in 31%, 26%, 41%, and 29% of studies, respectively. Race and ethnicity data were not reported in 22% and 45% of studies, respectively. Trials after 2015…
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