Table 2 Baseline characteristics of patients with SCLC based on radiotherapy status after propensity score matching.
Characteristic | Radiation (n = 13,329) | Non-radiation (n = 13,329) | P |
|---|---|---|---|
Age (%) | |||
< 70 | 8192 (61.5) | 8309 (62.3) | 0.143 |
≥ 70 | 5137 (38.5) | 5020 (37.7) | |
Gender(%) | |||
Female | 6471 (48.5) | 6511 (48.8) | 0.633 |
Male | 6858 (51.5) | 6818 (51.2) | |
Race (%) | |||
Black | 1187 (8.9) | 1080 (8.1) | 0.001 |
Other | 624 (4.7) | 527 (4.0) | |
White | 11,518 (86.4) | 11,722 (87.9) | |
Primary site (%) | |||
Main bronchus | 1665 (12.5) | 1603 (12.0) | 0.011 |
Upper lobe, lung | 6210 (46.6) | 6517 (48.9) | |
Middle lobe, lung | 539 (4.0) | 522 (3.9) | |
Lower lobe, lung | 2784 (20.9) | 2653 (19.9) | |
Overlapping lesion of lung | 226 (1.7) | 202 (1.5) | |
Lung, NOS | 1905 (14.3) | 1832 (13.7) | |
Laterality (%) | |||
Bilateral, single primary | 100 (0.8) | 86 (0.6) | 0.609 |
Left—origin of primary | 5473 (41.1) | 5483 (41.1) | |
Not a paired site | 38 (0.3) | 35 (0.3) | |
Only one side—side unspecified | 38 (0.3) | 31 (0.2) | |
Paired site, but no information concerning laterality | 302 (2.3) | 272 (2.0) | |
Right—origin of primary | 7378 (55.4) | 7422(55.7) | |
T | |||
T0 | 169 (1.3) | 145 (1.1) | 0.062 |
T1 | 1504 (11.3) | 1503 (11.3) | |
T2 | 3302 (24.8) | 3422 (25.7) | |
T3 | 619 (4.6) | 543 (4.1) | |
T4 | 7735 (58.0) | 7716 (57.9) | |
N | |||
N0 | 2031 (15.2) | 1964 (14.7) | 0.232 |
N1 | 962 (7.2) | 910 (6.8) | |
N2 | 7480 (56.1) | 7632 (57.3) | |
N3 | 2856 (21.4) | 2823 (21.2) | |
M | |||
M0 | 3996 (30.0) | 4124 (30.9) | 0.091 |
M1 | 9333 (70.0) | 9205 (69.1) | |
Surgery (%) | |||
No | 12,886 (96.7) | 12,975 (97.3) | 0.002 |
Yes | 443 (3.3) | 354 (2.7) | |
Chemotherapy (%) | |||
No/Unknown | 2464 (18.5) | 2641 (19.8) | 0.006 |
Yes | 10,865 (81.5) | 10,688 (80.2) | |
Marital status (%) | |||
Divorced/Separated | 2239 (16.8) | 2195 (16.5) | 0.21 |
Married | 6832 (51.3) | 7003 (52.5) | |
Single | 1866 (14.0) | 1821 (13.7) | |
Widowed | 2392 (17.9) | 2310 (17.3) | |
Median household income (%) | |||
< 35,000 | 468 (3.5) | 417 (3.1) | 0.094 |
> 75,000 | 3005 (22.5) | 2919 (21.9) | |
35,000–54,999 | 4411 (33.1) | 4393 (33.0) | |
55,000–74,999 | 5445 (40.9) | 5600 (42.0) | |
