Additional Postoperative Radiotherapy Prolonged the Survival of Patients with I-IIA Small Cell Lung Cancer: Analysis of the SEER Database

Table 2

Results of univariate Cox proportion hazard analysis for OS and CSS before PSM.

Characteristics	OS		CSS
	HR [95% CI]	value	HR [95% CI]	value
Radiation sequence
No PORT	Reference
PORT	0.84 [0.58–1.23]	0.376	0.73 [0.46–1.14]	0.166
Age	1.03 [1.01–1.06]	0.005	1.02 [1–1.05]	0.084
Race
Black	Reference
White	1.09 [0.35–3.44]	0.878	0.78 [0.25–2.46]	0.669
Other	1.99 [0.4–9.87]	0.402	1.87 [0.38–9.3]	0.443
Gender
Female	Reference
Male	1.55 [1.09–2.23]	0.016	1.47 [0.97–2.23]	0.071
T
T1	Reference
T2	1.07 [0.73–1.58]	0.728	1.17 [0.75–1.83]	0.497
Surgery type
Sublobar resection	Reference
Lobectomy or extended	0.38 [0.26–0.55]	<0.001	0.34 [0.22–0.52]	<0.001
Pneumonectomy or extended	0.22 [0.03–1.6]	0.135	0.3 [0.04–2.22]	0.241

value < 0.05; value < 0.01; value < 0.001.