Table 2.

Factors impacting the overall survival and disease-free survival*

Characteristics	OS		DFS
	Estimate (95% CI)	P value	Estimate (95% CI)	P value
Histologic type Age Smoking history Gender Tumor size Treatment sites	-1.364 (-2.579 to -0.149) -0.070 (-0.057 to 0.003) -0.004 (-0.634 to 0.624) 0.117 (-0.597 to 0.831) 0.164 (-0.390 to 0.717) -0.008 (-0.919 to 0.904)	0.028 0.080 0.988 0.745 0.557 0.987	-1.455 (-2.757 to -0.153) -0.033 (-0.057 to 0.003) -0.076 (-0.600 to 0.753) 0.181 (-0.585 to 0.947) 0.228 (-0.375 to 0.832) -0.112 (-1.079 to 0.855)	0.029 0.048 0.988 0.745 0.557 0.818

*Analyses were conducted using a mixed linear model with histologic type, age, smoking history, gender, and tumor size as the fixed effects and treatment sites as random effects