Radiation dose and survival of patients with stage IV non-small cell lung cancer undergoing concurrent chemotherapy and thoracic three-dimensional radiotherapy: reanalysis of the findings of a single-center prospective study

Table 2 Local-regional progression-free survival in 120 stage IV NSCLC patients according to responses of primary tumors

Variable	No.	Survival rate (%)				Median survival time (months)	95% confidence interval		χ ²	p
Variable	No.	1 year	2 year	3 year	5 year	Median survival time (months)	95% confidence interval		χ ²	p
CR	11	63.6	42.4	31.8	31.8	20	8.5	31.5	2.065	0.356
PR	91	58.3	27.5	18.3	0	15	11.5	18.5
SD	18	50.0	35.7	26.8	26.8	10	1.9	18.1
CR	11	63.6	42.4	31.8	31.8	20	8.5	31.5	1.922	0.166
PR + SD	109	56.9	29.0	19.7	7.8	15	11.9	18.1	1.922	0.166

ISSN: 1471-2407