marginally significantP = 0.063
On multivariate analysis, a total dose ≥63 Gy, a single site of metastatic disease, and undergoing ≥4 cycles of chemotherapy were independent prognostic factors for better OS ( P = 0.007, P = 0.014, and P = 0.038, respectively); radiotherapy involving metastatic sites was a marginally significant prognostic factor ( P = 0.063).