Table 5.
Independent predictive factors of non-lobe specific lymph node metastasis
| Variables | P value | OR | 95% CI |
|---|---|---|---|
| Hypertension | 0.025 | 0.512 | 0.286–0.918 |
| Smoking history | 0.077 | 0.617 | 0.361–1.053 |
| CEA level | 0.034 | 1.684 | 1.040–2.725 |
| Tumor location | |||
| RUL | 0.165 | 0.598 | 0.289–1.236 |
| RLL | 0.022 | 2.111 | 1.116–3.992 |
| LUL | 0.335 | 0.717 | 0.364–1.411 |
| LLL | / | 1 | / |
| Histology | |||
| Adenocarcinoma | / | 1 | / |
| SCC | 0.487 | 0.759 | 0.348–1.654 |
| Others | 0.733 | 1.162 | 0.491–2.749 |
| N1 involvement | |||
| 10 | 0.152 | 1.446 | 0.873–2.396 |
| 11 | 0.030 | 1.774 | 1.056–2.980 |
OR odds ratio; CI confidence interval; CEA carcinoembryonic antigen; RUL right upper lobe; RLL right lower lobe; LUL left upper lobe; LLL left lower lobe; SCC Squamous cell carcinoma