Table 3.
Univariate and multivariate analyses for systemic lymph node dissection.
| Variables | Univariate | Multivariate | |
|---|---|---|---|
| p | Hazard Ratio (95% CI) | p | |
| Patient characteristics | |||
| Age | <0.01 * | 1.02 (1.01–1.04) | 0.17 |
| Male | 0.55 | ||
| Pack-year | 0.77 | ||
| Carcinoembryonic antigen | |||
| Level | 0.76 | ||
| Clinical N stage | |||
| N1-2 | <0.01 * | 0.53 (0.36–0.79) | <0.01 * |
| Histology | |||
| Adenocarcinoma or SQCC | 0.32 | ||
| Procedures | |||
| More than lobectomy | <0.01 * | 0.11 (0.04–0.30) | <0.01 * |
| Approach | |||
| Thoracotomy | <0.01 * | 1.87 (1.13–3.05) | 0.01 * |
| Adjuvant | |||
| Chemotherapy and/or radiotherapy | <0.01 * | 0.60 (0.42–0.86) | <0.01 * |
| Pathological stage | |||
| More advanced | <0.01 * | 1.14 (1.04–1.26) | <0.01 * |
| Mutation status | |||
| EGFR or ALK positive | <0.01 * | 0.53 (0.38–0.75) | <0.01 * |
SQCC, squamous cell carcinoma; EGFR, epidermal growth factor receptor; ALK, anaplastic lymphoma kinase; CI, confidence index. p < 0.05, significant *.