Table 4. Univariate analysis of solitary bone metastasis subgroup.
LC, local control; DPFS, distant progression-free survival; OS, overall survival; HER2, human epidermal growth factor receptor 2; RT, radiation therapy; Gy10, biological equivalent dose in Gy with α/β = 10; WLRT, whole-lesion RT; MRTI, metastasis-to-RT interval.