Prognosis of non-small cell lung cancer patients with bone oligometastases treated concurrently with thoracic three-dimensional radiotherapy and chemotherapy

Table 2 Multivariate analysis of overall survival

Variable	HR	95% confidence interval		p- value
Variable	HR	lower	upper	p- value
T stage (T3-4 vs. T1-2)	1.368	0.863	2.168	0.182
GTV (<159 cm³ vs. ≥159 cm³)	0.564	0.314	1.014	0.056
KPS status (>70 vs. =70)	0.873	0.496	1.437	0.683
Thoracic radiation dose (<63 Gy vs. ≥63 Gy)	1.649	1.056	2.576	0.028
Response of primary tumor (SD + PD vs. CR + PR)	1.534	0.945	2.492	0.084
Chemotherapy (≥4 vs. <4 cycles)	0.804	0.507	1.274	0.353
Metastatic organ (bone with other organs vs. bone only)	1.880	1.203	2.937	0.006

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