Cumulative incidence of local progression. Cumulative incidence (CIF) of LP assuming death as competing risk after treatment with VLDRT for the (A) overall cohort and (B) stratified by treatment intent with Gray’s test P value. Comparison of analytic methods for LP: CIF vs Kaplan-Meier (KM) curve censoring for death and start of systemic therapy (1-KM) after VLDRT for (C) the entire cohort and (D) stratified by intent of VLDRT.