Patterns of care and outcomes of early stage I-II Hodgkin lymphoma treated with or without radiation therapy.

Omission of radiotherapy in the upfront management of early-stage classic Hodgkin lymphoma (cHL) has become more common with time. We report patterns of care and outcomes of stage I-II cHL treated with chemotherapy (CT) only versus CT and radiotherapy (combined modality therapy, CMT). From the National Cancer Database, we identified 28,327 early-stage cHL patients treated with CT ( n  = 15,798) or CMT ( n  = 12,529) from 2004 to 2018. CMT utilization declined over the period from 58% to 34%. With median follow-up of 6.2 years, the 5- and 10-year overall survival for CT versus CMT was 93.3% versus 96.9% ( p  < 0.001) and 88.7% versus 93.5% ( p  < 0.001), respectively. On multivariable analysis, uninsured (OR 0.75, p  < 0.001) and Black patients (OR 0.86, p  = 0.02) were less likely to receive CMT, and treatment with CT was predictive of death (OR 2.0, p  < 0.001). This report highlights real-world outcomes in early-stage cHL, with worse survival with CT and notable disparities in CMT utilization.