Table 3.
Univariate Analysis of positive lymph nodes (pN0, pN+)
| Variables | pN0 (%) | pN+ (%) | P-Value |
|---|---|---|---|
| Sex | 0.397 | ||
| male | 85 (59.9) | 57 (40.1) | |
| female | 41 (66.1) | 21 (33.9) | |
| Age | 0.314 | ||
| ≤ 68 years | 63 (58.3) | 45 (41.7) | |
| > 68 years | 63 (65.6) | 33 (34.4) | |
| Tumor site | 0.067 | ||
| Right | 84 (66.7) | 42 (33.3) | |
| Left | 42 (53.8) | 36 (46.2) | |
| Tumor localization | < 0.001 | ||
| central | 22 (41.5) | 31 (58.5) | |
| peripheral | 104 (69.8) | 45 (30.2) | |
| Tumor size | < 0.001 | ||
| ≤ 3 cm | 76 (74.5) | 26 (25.5) | |
| > 3 cm | 50 (49) | 52 (51) | |
| Lobe distribution | 0.834 | ||
| UL a | 78 (60.9) | 50 (39.1) | |
| Non-UL | 40 (62.5) | 24 (37.5) | |
| Number of dissected LN b | 0.005 | ||
| pT-category | 0.001 | ||
| pT1 | 69 (76.7) | 21 (23.3) | |
| pT2 | 27 (50.9) | 26 (49.1) | |
| pT3 | 17 (47.2) | 19 (52.8) | |
| pT4 | 11 (47.8) | 12 (52.2) | |
| R-classification | 0.048 | ||
| R0 | 120 (96.0) | 5 (4.0) | |
| R1–2 | 69 (88.5) | 9 (11.5) | |
| L-status | < 0.001 | ||
| L0 | 54 (94.7) | 3 (5.3) | |
| L1 | 71 (48.6) | 75 (51.4) | |
| V-status | 0.001 | ||
| V0 | 111 (67.3) | 54 (32.7) | |
| V1 | 14 (36.8) | 24 (63.2) | |
| Pn-status | 0.188 | ||
| Pn0 | 121 (96.8) | 4 (3.2) | |
| Pn1 | 72 (92.3) | 6 (7.7) | |
| Histological tumor type | 0.141 | ||
| Adeno-Ca.b | 79 (67.5) | 38 (32.5) | |
| SCCc | 41 (54.7) | 34 (45.3) | |
| others | 6 (50.0) | 6 (50.0) | |
| Grading | 0.005 | ||
| G1 | 22 (88.0) | 3 (12.0) | |
| G2 | 60 (63.2) | 35 (36.8) | |
| G3 | 34 (50.0) | 34 (50.0) | |
| G4 | 6 (50.0) | 6 (50.0) | |
aUL Upper lobe, bAdeno-Ca. Adenocarcinoma, cSCC Squamous cell carcinoma