Table 1 Summary of major themes associated with disparities in radiation therapy delivery

1) Underutilization of Definitive Radiation Therapy and/or Surgery

Race [1, 2]; Insurance [3]

2) Delayed Time from Diagnosis to Radiation Therapy Initiation

Race, Ethnicity, Insurance, Age, Income, Education [6]

3) Underutilization of Advanced Radiation Therapy Techniques (i.e. Intensity-Modulated Radiation Therapy)

Income [11]

4) Limited Access to High-Volume Radiation Therapy Providers

Race [13]; Insurance [14]