Variables | Total | pN0 | pN1 + N2 | χ2 | p |
---|---|---|---|---|---|
All patients | 650 | 606 (93.2%) | 44 (6.8%) | ||
Gender | 1.595 | 0.207 | |||
Female | 398 | 375 (94.2%) | 23 (5.8%) | ||
Male | 252 | 231 (91.7%) | 21 (8.3%) | ||
Age, years | 0.794 | 0.435 | |||
< 60 | 342 | 316 (92.4%) | 26 (7.6%) | ||
≥ 60 | 308 | 290 (94.2%) | 18 (5.8%) | ||
Smoking history | 8.439 | 0.004 | |||
None | 464 | 441 (95.0%) | 23 (5.0%) | ||
Yes | 186 | 165 (88.7%) | 21 (11.3%) | ||
Pathological type | 0.951 | 0.633※ | |||
Adenocarcinoma | 601 | 561 (93.3%) | 40 (6.7%) | ||
Squamous cell carcinoma | 36 | 33 (91.7%) | 3 (8.3%) | ||
Other types of malignant tumors* | 13 | 12 (92.3%) | 1 (7.7%) | ||
Tumor locations | 6.247 | 0.178※ | |||
Right upper lobe | 243 | 232 (95.5%) | 11 (4.5%) | ||
Right middle lobe | 53 | 48 (90.6%) | 5 (9.4%) | ||
Right lower lobe | 99 | 92 (92.9%) | 7 (7.1%) | ||
Left upper lobe | 183 | 169 (92.3%) | 14 (7.7%) | ||
Left lower lobe | 72 | 65 (90.3%) | 7 (9.7%) |