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Table 3 Univariate Analysis of positive lymph nodes (pN0, pN+)

From: Predictive risk factors for lymph node metastasis in patients with resected non-small cell lung cancer: a case control study

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)
pR-classification 0.048
 pR0 120 (96.0) 5 (4.0)
 pR1–2 69 (88.5) 9 (11.5)
pL-status < 0.001
 pL0 54 (94.7) 3 (5.3)
 pL1 71 (48.6) 75 (51.4)
pV-status 0.001
 pV0 111 (67.3) 54 (32.7)
 pV1 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)
  1. aUL Upper lobe, bAdeno-Ca. Adenocarcinoma, c SCC Squamous cell carcinoma