Factors associated with IMRT use in multivariable logistic regression analysis.

All variables listed were included in the multivariable model in addition to age at diagnosis (continuous), tumor stage (I or II), tumor grade (I, II, or III), race (white vs. other race), Charlson comorbidity score (0 vs. ≥1), residential setting (big metro vs. other setting), proportion living in poverty in census tract (≤25% vs. >25%), and proportion college educated in census tract (≤50% vs. >50%). Variables not shown did not have statistically significant associations with IMRT use.