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| Variable | HR | 95% CI | P value |
|---|---|---|---|
| FVC (%) | 0.98 | 0.95–1.01 | 0.23 |
| FEV1/FVC (%) | 0.99 | 0.98–0.99 | 0.02 |
| pN status | 1.40 | 1.04–1.88 | 0.02 |
| Operative procedure (lobar =0, sublobar =1) | 0.50 | 0.21–1.15 | 0.10 |
FVC, forced vital capacity; FEV1, forced expiratory volume in 1 sec; pN, pathologic positive lymph node (N1 or N2); sublobar, wedge resection or segmentectomy; lobar, lobectomy or bilobectomy or pneumonectomy.
