Background: Studies suggest treatment outcomes may vary between high (HVC)- and low-volume centers (LVC). Radiation therapy (RT) for head and neck cancer (HNC) requires weeks of treatment, the inconvenience of which may influence a patient's choice for treatment location. We hypothesized that receipt of RT for HNC at a HVC would influence outcomes compared to patients evaluated at a HVC, but who chose to receive RT at a LVC.
Methods: From 1998 to 2011, 1930 HNC patients were evaluated at a HVC and then treated with RT at either a HVC or LVC. Time-to-event outcomes and treatment factors were compared.
Results: Median follow-up was 34 months. RT was delivered at a HVC for 1368 (71%) patients and at a LVC in 562 (29%). Patients were more likely to choose HVC-RT if they resided in the HVC's county or required definitive RT (all P < 0.001). HVC-RT was associated with a significant improvement in 3-year LRC (84% vs 68%), DFS (68% vs 48%), and OS (72% vs 57%) (all P < 0.001). On multivariate analysis (MVA), HVC-RT independently predicted for improved LRC, DFS, and OS (all P < 0.05).
Conclusions: In patients evaluated at a HVC, the choice of RT location was primarily influenced by their residing distance from the HVC. HVC-RT was associated with improvements in LRC, DFS, and OS in HNC. As treatment planning and delivery are technically demanding in HNC, the choice to undergo treatment at a HVC may result in more optimal delivered dose, RT duration, and outcome.
Keywords: expertise; head and neck cancer; high-volume center; outcome; radiation; radiotherapy.
© 2018 The Authors. Cancer Medicine published by John Wiley & Sons Ltd.