Table 1 The general characteristics of the patients
Variables | Number | Percentage (%) |
|---|---|---|
Gender | ||
Male | 221 | 35.5 |
Female | 401 | 64.5 |
Age | ||
< 60 | 273 | 43.9 |
≥ 60 | 349 | 56.1 |
Smoking history | ||
Yes | 132 | 21.2 |
No | 487 | 78.3 |
Missing | 3 | 0.5 |
CEA level (ng/ml) | ||
≤ 5 | 533 | 85.7 |
> 5 | 79 | 12.7 |
Missing | 10 | 1.6 |
Tumor Size (cm) | ||
≤ 1 | 120 | 19.3 |
> 1 and ≤ 2 | 310 | 49.8 |
> 2 and ≤ 3 | 192 | 30.9 |
Lobe distribution | ||
Right upper lobe | 202 | 32.5 |
Right middle lobe | 33 | 5.3 |
Right lower lobe | 81 | 13.0 |
Left upper Lobe | 177 | 28.5 |
Left lower lobe | 129 | 20.7 |
Operation type | ||
Segmentectomy | 74 | 11.9 |
Lobectomy | 548 | 88.1 |
Tumor location | ||
Central | 20 | 3.2 |
Peripheral | 602 | 96.8 |
Consolidation tumor ratio | ||
Pure GGO | 146 | 23.5 |
GGO-predominant | 163 | 26.2 |
Solid-predominant | 62 | 9.9 |
Solid | 251 | 40.4 |
Pleural invasion | ||
Yes | 62 | 10.0 |
No | 560 | 90.0 |
Pathologic type | ||
MIA | 34 | 5.5 |
LPA | 89 | 14.3 |
IA | 499 | 80.2 |
N stage | ||
N0 | 562 | 90.4 |
N1 | 28 | 4.5 |
N2 | 32 | 5.1 |