Table 3.
Demographic and clinical characteristics of 716 patients diagnosed with second primary lung cancer after 2004.
| Characteristic | Results | |||
| Age (years), mean (SD) | 65.8 (9.0) | |||
| Race, n (%) | ||||
|
|
White | 608 (84.9) | ||
|
|
Black | 65 (9.1) | ||
|
|
Other | 43 (6) | ||
| Sex, n (%) | ||||
|
|
Male | 310 (43.3) | ||
|
|
Female | 406 (56.7) | ||
| Relative location, n (%) | ||||
|
|
Ipsilateral | 279 (39) | ||
|
|
Contralateral | 437 (61) | ||
| Interval, mean (SD) | 74.2 (21.4) | |||
| Initial primary lung cancer | ||||
|
|
T stage, n (%) | |||
|
|
|
T1 | 315 (44) | |
|
|
|
T2 | 277 (38.7) | |
|
|
|
T3 | 35 (4.9) | |
|
|
|
T4 | 66 (9.2) | |
|
|
|
Unknown | 23 (3.2) | |
|
|
N stage, n (%) | |||
|
|
|
N0 | 528 (73.7) | |
|
|
|
N1 | 80 (11.2) | |
|
|
|
N2 | 97 (13.5) | |
|
|
|
Unknown | 11 (1.5) | |
|
|
Histology, n (%) | |||
|
|
|
ADCa | 406 (56.7) | |
|
|
|
SCCb | 206 (28.8) | |
|
|
|
Other NSCLCc | 104 (14.5) | |
|
|
Grade, n (%) | |||
|
|
|
Well differentiated | 94 (13.1) | |
|
|
|
Moderately differentiated | 275 (38.4) | |
|
|
|
Poorly differentiated | 211 (29.5) | |
|
|
|
Undifferentiated | 18 (2.5) | |
|
|
|
Unknown | 118 (16.5) | |
|
|
Surgery, n (%) | |||
|
|
|
No surgery | 131 (18.3) | |
|
|
|
Sublevel resection | 106 (14.8) | |
|
|
|
Lobectomy | 455 (63.5) | |
|
|
|
Pneumonectomy | 24 (3.4) | |
|
|
Chemotherapy, n (%) | |||
|
|
|
Yes | 237 (33.1) | |
|
|
|
No/unknown | 479 (66.9) | |
|
|
Radiotherapy, n (%) | |||
|
|
|
Yes | 174 (24.3) | |
|
|
|
No/unknown | 542 (75.7) | |
| Second primary lung cancer | ||||
|
|
Size (cm), n (%) | |||
|
|
|
0-3 | 385 (53.8) | |
|
|
|
3-5 | 71 (9.9) | |
|
|
|
>5 | 56 (7.8) | |
|
|
|
Unknown | 204 (28.5) | |
|
|
Surgery, n (%) | |||
|
|
|
No surgery | 533 (74.4) | |
|
|
|
Wedge resection | 102 (14.2) | |
|
|
|
Lobectomy | 81 (11.3) | |
|
|
Chemotherapy, n (%) | |||
|
|
|
Yes | 201 (28.1) | |
|
|
|
No/unknown | 515 (71.9) | |
|
|
Radiotherapy, n (%) | |||
|
|
|
Yes | 309 (43.2) | |
|
|
|
No/unknown | 407 (56.8) | |
|
|
Treatment, n (%) | |||
|
|
|
None | 224 (31.3) | |
|
|
|
Only radiation | 309 (43.2) | |
|
|
|
Only wedge | 102 (14.2) | |
|
|
|
Only lobectomy | 81(11.3) | |
aADC: adenocarcinoma.
bSCC: squamous cell carcinoma.
cNSCLC: non-small cell lung cancer.