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Table 3 Multivariate analyses for OS in non-oligometastatic patient

From: Might radiation therapy in addition to chemotherapy improve overall survival of patients with non-oligometastatic Stage IV non-small cell lung cancer?: Secondary analysis of two prospective studies

Variable Pre-PSM Cohort Post-PSM Cohort  
HR 95.0% confidence interval P value HR 95.0% confidence interval P value
lower upper lower upper
Radiation dose, Gy
(<63 vs. ≥63)
1.481 1.071 2.047 0.018 1.656 1.125 2.438 0.011
Response to chemotherapy
(No vs. Yes)
1.541 1.092 2.176 0.014 1.643 1.073 2.517 0.022
Post-treatment KPS
(Decreased vs. Increased or stable)
1.958 1.319 2.907 0.001 1.704 1.064 2.729 0.026
No. of chemotherapy cycles
(≥4 vs. <4)
0.796 0.572 1.106 0.173 - - - -
Gross tumor volume, cm3
(≥146 vs. <146)
1.479 1.082 2.021 0.014 - - - -