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Table 1 Baseline characteristics of 2129 patients with SCLC

From: Selection of candidates for surgery as local therapy among early-stage small cell lung cancer patients: a population-based analysis

Characteristic All patients (n = 2129) Surgery (n = 387) RT (n = 1032) P b Surgery + RT (n = 154) No surgery or RT (n = 556)
Age (years)a 68.3 ± 9.9 67.8 ± 9.4 67.6 ± 9.7 0.837 63.8 ± 8.5 71.3 ± 10.2
Race     0.011   
 White 1875 (88.1) 355 (91.7) 886 (85.9)   146 (94.8) 488 (87.8)
 Black 173 (8.1) 22 (5.7) 94 (9.1)   6 (3.9) 51 (9.2)
 Others 81 (3.8) 10 (2.6) 52 (5.0)   2 (1.3) 17 (3.1)
Sex     0.965   
 Male 988 (46.4) 179 (46.3) 476 (46.1)   66 (42.9) 267 (48.0)
 Female 1141 (53.6) 208 (53.7) 556 (53.9)   88 (57.1) 289 (52.0)
Laterality of tumor location     0.740   
 Left lung 927 (43.5) 169 (43.7) 451 (43.7)   68 (44.2) 239 (43.0)
 Right lung 1191 (55.9) 217 (56.1) 575 (55.7)   85 (55.2) 314 (56.5)
 Others 11 (0.5) 1 (0.3) 6 (0.6)   1 (0.6) 3 (0.5)
Surgery methodc     0.327d   
 Pneumonectomy 11 (2.8)   2 (1.3)
 Lobectomy 271 (70.0)   102 (66.2)
 Sub-lobectomy 103 (26.6)   50 (32.5)
T category     < 0.001   
 T1 1001 (47.0) 233 (60.2) 441 (42.7)   89 (57.8) 238 (42.8)
 T2 839 (39.4) 133 (34.4) 421 (40.8)   52 (33.8) 233 (41.9)
 T3 289 (13.6) 21 (5.4) 170 (16.5)   13 (8.4) 85 (15.3)
N category     < 0.001   
 N0 1610 (75.6) 324 (83.7) 736 (71.3)   96 (62.3) 454 (81.7)
 N1 519 (24.4) 63 (16.3) 296 (28.7)   58 (37.7) 102 (18.3)
TNM stage     < 0.001   
 T1N0 723 (34.0) 198 (51.2) 283 (27.4)   56 (36.4) 186 (33.5)
 T2N0 598 (28.1) 105 (27.1) 283 (27.4)   27 (17.5) 183 (32.9)
 T3N0 289 (13.6) 21 (5.4) 170 (16.5)   13 (8.4) 85 (15.3)
 T1-2N1 519 (24.4) 63 (16.3) 296 (28.7)   58 (37.7) 102 (18.3)
  1. SCLC small cell lung cancer, RT radiotherapy
  2. aThese data are presented as mean ± standard deviation (SD); other data are all presented as the number of patients, followed by the percentage in parentheses
  3. bComparisons between surgery and radiotherapy groups, except for the comparison of the surgery method
  4. cFor patients who underwent surgery, surgery information was unavailable for two patients
  5. dComparisons between surgery and surgery + RT groups