Variables | No. | Univariate analyses | Multivariate analyses | ||||
---|---|---|---|---|---|---|---|
Station 4R metastasis no. (%) | P | ||||||
Positive | Negative | OR | 95% CI | P | |||
Age (year) | Â | Â | Â | 0.208 | Â | Â | Â |
 < 65 | 1312 | 185 (14.1) | 1127 (85.9) |  |  |  |  |
 ≥ 65 | 551 | 65 (11.8) | 486 (88.2) |  |  |  |  |
Gender | Â | Â | Â | 0.273 | Â | Â | Â |
 Female | 816 | 101 (12.4) | 715 (87.6) |  |  |  |  |
 Male | 1047 | 149 (14.2) | 898 (85.8) |  |  |  |  |
Smoking history | Â | Â | Â | 1.000 | Â | Â | Â |
 Yes | 1080 | 145 (13.4) | 935 (86.6) |  |  |  |  |
 No | 783 | 105 (13.4) | 678 (86.6) |  |  |  |  |
Surgical approaches |  |  |  | < 0.001 |  |  |  |
 Thoracoscopic surgery | 860 | 78 (9.1) | 782 (90.9) |  | 1 |  |  |
 Thoracotomy | 1003 | 172 (17.2) | 831 (82.8) |  | 1.19 | 0.81–1.77 | 0.362 |
Tumor location | Â | Â | Â | 0.013 | Â | Â | Â |
 Upper lobe | 994 | 154 (15.5) | 840 (84.5) |  | 1 |  |  |
 Middle lobe | 224 | 21 (9.4) | 203 (90.6) |  | 0.46 | 0.24–0.84 | 0.016 |
 Lower lobe | 645 | 75 (11.6) | 570 (88.4) |  | 0.44 | 0.29–0.65 | < 0.001 |
Histological type | Â | Â | Â | 0.305 | Â | Â | Â |
 Adenocarcinoma | 1265 | 178 (14.1) | 1087 (85.9) |  |  |  |  |
 Squamous cell carcinoma | 397 | 44 (11.1) | 353 (88.9) |  |  |  |  |
 Others | 201 | 28 (13.9) | 173 (86.1) |  |  |  |  |
pT stage |  |  |  | < 0.001 |  |  |  |
 T1a | 169 | 8 (4.7) | 161 (95.3) |  | 1 |  |  |
 T1b | 557 | 52 (9.3) | 505 (90.7) |  | 1.73 | 0.73–4.63 | 0.241 |
 T1c | 524 | 79 (15.1) | 445 (84.9) |  | 2.79 | 1.21–7.38 | 0.025 |
 T2a | 252 | 39 (15.5) | 213 (84.5) |  | 2.65 | 1.06–7.39 | 0.047 |
 T2b | 157 | 26 (16.6) | 131 (83.4) |  | 2.36 | 0.86–7.05 | 0.106 |
 T3 | 147 | 34 (23.1) | 113 (76.9) |  | 4.89 | 1.87–14.07 | 0.002 |
 T4 | 57 | 12 (21.1) | 45 (78.9) |  | 4.17 | 1.28–14.05 | 0.019 |
Station 2 metastasis | 116 | 84 (72.4) | 32 (27.6) | < 0.001 | 11.19 | 6.67–19.06 | < 0.001 |
Station 3 metastasis | 139 | 93 (66.9) | 46 (33.1) | < 0.001 | 6.06 | 3.79–9.72 | < 0.001 |
Station 7 metastasis | 207 | 105 (50.7) | 102 (49.3) | < 0.001 | 5.02 | 3.31–7.63 | < 0.001 |
Station 8 metastasis | 38 | 21 (55.3) | 17 (44.7) | < 0.001 | 1.43 | 0.59–3.48 | 0.423 |
Station 9 metastasis | 53 | 28 (52.8) | 25 (47.2) | < 0.001 | 1.44 | 0.65–3.13 | 0.355 |
Station 10 metastasis | 220 | 93 (42.3) | 127 (57.7) | < 0.001 | 2.15 | 1.41–3.24 | < 0.001 |
Station 11 metastasis | 248 | 107 (43.2) | 141 (56.8) | < 0.001 | 2.58 | 1.71–3.87 | < 0.001 |