Table 1 Demographic and clinical characteristics of subjects (N = 2711)
Age (y) | 59.6 ± 9.6 |
|---|---|
Gender | |
Male | 1803 (66.5) |
Female | 908 (33.5) |
Smoking history | |
Smoker | 1722 (63.5) |
Never | 989 (36.5) |
Surgical procedure | |
Segmentectomy | 65 (2.4) |
Lobectomy | 2254 (83.1) |
Pneumonectomy | 373 (13.8) |
Extended | 19 (0.7) |
Surgical margin status | |
Positive | 130 (4.8) |
Negative | 2581 (95.2) |
Histology | |
Squamous | 1365 (50.4) |
Adenocarcinoma | 924 (34.1) |
Large cell | 33 (1.2) |
Adenosquamous | 159 (5.9) |
Other | 230 (8.5) |
T stage | |
T1/T2 | 2354 (86.8) |
T3/T4 | 357 (13.2) |
N stage | |
N0 | 1544 (57.0) |
N1/N2 | 1167 (43.0) |
AJCC TNM Stage | |
IA | 558 (20.6) |
IB | 589 (21.7) |
II A | 444 (16.4) |
IIB | 229 (8.4) |
III | 891 (32.9) |
Lymph node stations examined | |
< 6 group | 1040 (38.4) |
≥ 6 group | 1671 (61.6) |
Number of lymph nodes removed | |
< 10 | 689 (25.4) |
10-20 | 943 (34.8) |
≥ 20 | 1079 (39.8) |
Adjuvant chemotherapy | |
Yes | 1333 (49.2) |
No | 1378 (50.8) |
Radiotherapy | |
Yes | 427 (15.8) |
No | 2284 (84.2) |
Immunotherapy | |
Yes | 224 (8.3) |
No | 2487 (91.7) |