Table 1 Correlation of perineural invasion with patients’ clinicopathological features in primary esophageal squamous cell carcinomas
From: The prognostic effect of perineural invasion in esophageal squamous cell carcinoma
Variables | Perineural invasion | |||
|---|---|---|---|---|
Cases | Absent | Present | P value* | |
Age (years) | Â | Â | Â | 0.083 |
  ≤ 57.0†| 230 | 110 (47.8%) | 120 (52.2%) |  |
  > 57.0 | 203 | 114 (56.2%) | 89 (43.8%) |  |
Gender | Â | Â | Â | 0.502 |
  Female | 112 | 61 (54.5%) | 51 (45.5%) |  |
  Male | 321 | 163 (50.8%) | 158 (49.2%) |  |
Location | Â | Â | Â | 0.098 |
  Upper | 28 | 14 (50.0%) | 14 (50.0%) |  |
  Middle | 298 | 145 (48.7%) | 153 (51.3%) |  |
  Lower | 107 | 65 (60.7%) | 42 (39.3%) |  |
Tumor size (cm) | Â | Â | Â | 0.952 |
  ≤ 4‡ | 277 | 143 (51.6%) | 134 (48.4%) |  |
  > 4 | 156 | 81 (51.9%) | 75 (48.1%) |  |
Differentiation | Â | Â | Â | 0.017 |
  Well | 67 | 41 (61.2%) | 26 (38.8%) |  |
  Moderate | 288 | 153 (53.1%) | 135 (46.9%) |  |
  Poor | 78 | 30 (38.5%) | 48 (61.5%) |  |
pT status | Â | Â | Â | 0.036 |
  T1 | 20 | 15 (75.0%) | 5 (25.0%) |  |
  T2 | 104 | 59 (56.7%) | 45 (43.3%) |  |
  T3 | 309 | 150 (48.5%) | 159 (51.5%) |  |
pN status | Â | Â | Â | < 0.0001 |
  N0 | 233 | 137 (58.8%) | 96 (41.2%) |  |
  N1 | 111 | 59 (53.2%) | 52 (46.8%) |  |
  N2 | 71 | 25 (35.2%) | 46 (64.8%) |  |
  N3 | 18 | 3 (16.7%) | 15 (83.3%) |  |
Stage | Â | Â | Â | < 0.0001 |
  I | 25 | 19 (76.0%) | 6 (24.0%) |  |
  II | 238 | 138 (58.0%) | 100 (42.0%) |  |
  III | 170 | 67 (39.4%) | 103 (60.6%) |  |