Impact of Time-to-Treatment Initiation and First Inter-Cycle Delay in Patients with Hodgkin Lymphoma

Background: Delays in treatments are frequent in real-world lymphoma management. This study evaluates the impact of diagnosis-to-treatment intervals (DTIs) and first inter-cycle delay (IcD) on outcomes in patients with Hodgkin lymphoma (HL) receiving ABVD chemotherapy. Methods: We retrospectively analyzed 137 patients with classical HL treated with ABVD at a single institution between 2015 and 2022. Results: The median age was 34 years (range: 18-73), and 62% were male. The median DTI was 14 days, with 24.1% of patients experiencing a delay of >7 days between the first and second chemotherapy cycles. The most frequent reason for delay was neutropenia, observed in 69% of delayed cases. Neither DTI nor IcD was significantly associated with PFS or OS. Multivariate analysis identified elevated beta-2 microglobulin as an independent predictor of both inferior PFS and OS. Conclusions: This is the first study to evaluate both DTI and first IcD as independent prognostic factors in HL. Modest delays in treatment initiation or early cycle administration did not negatively affect survival. Timely but flexible scheduling of ABVD may be appropriate in HL. Prospective studies are warranted in the era of novel therapeutic agents.