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

Table 1

Characteristics and demographics of SCLC patients.

	Before PSM					After PSM
	Total	No PORT	PORT	value		Total	No PORT	PORT	value
	278	N = 178	N = 100			170	N = 85	N = 85
Age	278	67.0 [59.0; 72.0]	65.5 [59.8; 70.0]	0.364	Age	170	65.0 (8.97)	65.5 (8.06)	0.699
Gender				1	Gender				1
Female	157	101 (56.7%)	56 (56.0%)		Female	95	48 (56.5%)	47 (55.3%)
Male	121	77 (43.3%)	44 (44.0%)		Male	75	37 (43.5%)	38 (44.7%)
Race				0.423	Race				1
Black	8	7 (3.93%)	1 (1.00%)		Black	0	—	—
Other	5	3 (1.69%)	2 (2.00%)		Other	0	—	—
White	265	168 (94.4%)	97 (97.0%)		White	170	85 (100%)	85 (100%)
Years of diagnosis				0.921	Years of diagnosis				0.81
2004–2009	124	78 (43.8%)	46 (46.0%)		2004–2009	80	38 (44.7%)	42 (49.4%)
2010–2015	124	81 (45.5%)	43 (43.0%)		2010–2015	72	38 (44.7%)	34 (40.0%)
2016	30	19 (10.7%)	11 (11.0%)		2016	18	9 (10.6%)	9 (10.6%)
Specific stage				0.452
IA	198	130 (73.0%)	68 (68.0%)
IB/IIA	80	48 (27.0%)	32 (32.0%)
T				0.452	T				0.213
T1	198	130 (73.0%)	68 (68.0%)		T1	128	68 (80.0%)	60 (70.6%)
T2	80	48 (27.0%)	32 (32.0%)		T2	42	17 (20.0%)	25 (29.4%)
Surgery type				0.079	Surgery type				0.747
Sublobar resection	93	52 (29.2%)	41 (41.0%)		Sublobar resection	59	31 (36.5%)	28 (32.9%)
Lobectomy or extended	182	123 (69.1%)	59 (59.0%)		Lobectomy or extended	111	54 (63.5%)	57 (67.1%)
Pneumonectomy or extended	3	3 (1.69%)	0 (0.00%)		Pneumonectomy or extended	0
Tumor size	278	1.95 [1.40; 2.60]	2.00 [1.50; 2.60]	0.453	Tumor size	170	1.90 [1.40; 2.50]	2.00 [1.50; 2.60]	0.463