Table 1 Clinicopathologic characteristics
Variable | Total | pN0 | pN1 + N2 | X2 | P value |
|---|---|---|---|---|---|
All patients | 327 | 301 | 26 | ||
Age (years) | 2.264 | 0.322 | |||
≥ 60 | 172 | 162 | 10 | ||
< 60 | 155 | 139 | 16 | ||
Gender | 5.663 | 0.017 | |||
Male | 121 | 117 | 4 | ||
Female | 206 | 184 | 22 | ||
Smoking history | 1.593 | 0.207 | |||
Present | 139 | 131 | 8 | ||
Absent | 188 | 170 | 18 | ||
Tumor size (cm) | 29.986 | 0.000 | |||
< 1.0 | 79 | 79 | 0 | ||
1.1–2.0 | 140 | 135 | 5 | ||
2.1–3.0 | 108 | 87 | 21 | ||
Consolidation tumor ratio(C/T) | 14.676 | 0.001 | |||
0 | 43 | 43 | 0 | ||
0 to ≤0.5 | 50 | 50 | 0 | ||
0.5to<1 | 120 | 111 | 9 | ||
1 | 114 | 97 | 17 | ||
CEA level (ng/mL) | 5.246 | 0.022 | |||
≤ 5 | 268 | 251 | 17 | ||
>5 | 59 | 50 | 9 | ||
Tumor location | 0.569 | 0.966 | |||
Right upper lobe | 102 | 95 | 7 | ||
Right middle lobe | 31 | 28 | 3 | ||
Right lower lobe | 53 | 49 | 4 | ||
Left upper lobe | 79 | 73 | 6 | ||
Left lower lobe | 62 | 56 | 6 | ||
Operations type | 5.560 | 0.062 | |||
Wedge | 29 | 29 | 0 | ||
Segmentectomy | 43 | 42 | 1 | ||
Lobectomy | 255 | 230 | 25 | ||
Pathologic type | 10.407 | 0.004 | |||
AIS | 31 | 31 | 0 | ||
MIA | 52 | 52 | 0 | ||
IA | 244 | 218 | 26 | ||
Lymphovascular invasion | 53.189 | 0.000 | |||
Present | 51 | 34 | 17 | ||
Absent | 276 | 267 | 9 | ||
Pleural invasion | 44.469 | 0.000 | |||
Present | 46 | 31 | 15 | ||
Absent | 281 | 270 | 11 |