Table 1 Baseline characteristics of patients with non-small-cell lung cancer.
Characteristics | Number of Patients | |||
|---|---|---|---|---|
All patients (n = 6996) | Tumor size 3–4 cm (n = 4599) | Tumor size 4–5 cm (n = 2397) | P | |
Age | — | — | — | 0.362 |
<60 y | 1120 | 723 | 397 | |
≥60 y | 5876 | 3876 | 2000 | |
Sex | 0.037 | |||
Male | 3650 | 2358 | 1292 | |
Female | 3346 | 2241 | 1105 | |
Race | 0.905 | |||
White | 5914 | 3886 | 2028 | |
Nonwhite | 1082 | 713 | 369 | |
Location | 0.435 | |||
Left | 2944 | 1920 | 1024 | |
Right | 4052 | 2679 | 1373 | |
Histology | <0.001 | |||
Adenocarcinoma | 3545 | 2416 | 1129 | |
Nonadenocarcinoma | 3451 | 2183 | 1268 | |
Differential degree | <0.001 | |||
Well or Moderate | 3763 | 2561 | 1202 | |
Poor or Undifferentiated | 2844 | 1803 | 1041 | |
Unknown | 389 | 235 | 154 | |
Primary site | <0.001 | |||
Up | 4118 | 2744 | 1374 | |
Middle | 335 | 241 | 94 | |
Low | 2343 | 1508 | 835 | |
Main bronchus | 46 | 19 | 27 | |
Overlapping lesion of lung | 103 | 57 | 46 | |
Other | 51 | 30 | 21 | |
Regional nodes examined | — | — | — | 0.149 |
None | 517 | 345 | 172 | |
1 to 30 | 5727 | 3780 | 1947 | |
31 to 60 | 159 | 94 | 65 | |
61 to 90 | 8 | 3 | 5 | |
Other | 585 | 377 | 208 | |
Scope of regional LN surgery | — | — | — | 0.014 |
None | 443 | 303 | 140 | |
1 to 3 | 1004 | 700 | 304 | |
> = 4 | 5201 | 3371 | 1830 | |
Other | 348 | 225 | 123 | |
Surgery modality | <0.001 | |||
Wedge resection | 570 | 434 | 136 | |
Segmental resection | 190 | 136 | 54 | |
Lobectomy | 5936 | 3872 | 2064 | |
Pneumonectomy | 202 | 107 | 95 | |
Other | 98 | 50 | 48 | |
