Table 1 Patient demographic information and histological evaluation of the lesional tissue.
From: Prognostic impact of lymphovascular and perineural invasion in squamous cell carcinoma of the tongue
|  | P–V− | P–V +  | P + V− | P + V +  | Total | χ2 | p-value |
|---|---|---|---|---|---|---|---|
Gender | |||||||
 Female | 45 (35.4%) | 4 (3.1%) | 8 (6.3%) | 2 (1.6%) | 59 (46.5%) | 0.517 | 0.915 |
 Male | 50 (39.4%) | 4 (3.1%) | 10 (7.9%) | 4 (3.1%) | 68 (53.5%) | ||
Age (years) | |||||||
  < 60 | 52 (40.9%) | 6 (4.7%) | 10 (7.9%) | 4 (3.1%) | 72 (56.7%) | 1.493 | 0.684 |
  ≥ 60 | 43 (33.9%) | 2 (1.6%) | 8 (6.3%) | 2 (1.6%) | 55 (43.3%) | ||
Smoking | |||||||
 No | 73 (57.5%) | 5 (3.9%) | 13 (10.2%) | 4 (3.1%) | 95 (74.8%) | 1.126 | 0.771 |
 Yes | 22 (17.3%) | 3 (2.4%) | 5 (3.9%) | 2 (1.6%) | 32 (25.2%) | ||
Alcohol | |||||||
 No | 74 (58.3%) | 4 (3.1%) | 15 (11.8%) | 4 (3.1%) | 97 (76.4%) | 4.003 | 0.261 |
 Yes | 21 (16.5%) | 4 (3.1%) | 3 (2.4%) | 2 (1.6%) | 30 (23.6%) | ||
Pathologic T stage | |||||||
 T1-2 | 81 (63.8%) | 6 (4.7%) | 10 (7.9%) | 2 (1.6%) | 99 (78%) | 15.199 | 0.002* |
 T3-4 | 14 (11%) | 2 (1.6%) | 8 (6.3%) | 4 (3.1%) | 28 (22%) | ||
Pathologic N stage | |||||||
 N0 | 78 (61.4%) | 3 (2.4%) | 12 (9.4%) | 0 (0%) | 93 (73.2%) | 25.835 |  < 0.001* |
 N +  | 17 (13.4%) | 5 (3.9%) | 6 (4.7%) | 6 (4.7%) | 34 (26.8%) | ||
Tumor stage | |||||||
 I-II | 67 (52.8%) | 3 (2.4%) | 7 (5.5%) | 0 (0%) | 77 (60.6%) | 18.495 |  < 0.001* |
 III-IV | 28 (22%) | 5 (3.9%) | 11 (8.7%) | 6 (4.7%) | 50 (39.4%) | ||
Histological grade | |||||||
 Poorly-moderately | 44 (34.6%) | 7 (5.5%) | 8 (6.3%) | 4 (3.1%) | 63 (49.6%) | 5.897 | 0.117 |
 Well | 51 (40.2%) | 1 (0.8%) | 10 (7.9%) | 2 (1.6%) | 64 (50.4%) | ||
Postoperative radiotherapy | |||||||
 No | 83 (65.4%) | 6 (4.7%) | 12 (9.4%) | 6 (4.7%) | 107 (84.3%) | 6.528 | 0.089 |
 Yes | 12 (9.4%) | 2 (1.6%) | 6 (4.7%) | 0 (0%) | 20 (15.7%) | ||
