Table 2. The clinicopathological characteristics for verified samples.
| Main features | Group 1† | Group 2‡ | P value |
|---|---|---|---|
| Gender (n) | 1.000 | ||
| Male | 20 | 20 | |
| Female | 5 | 5 | |
| Median age (year) | 62 (46 to 76) | 63 (45 to 82) | |
| Age (n) | 0.564 | ||
| ≥60 years | 14 | 16 | |
| <60 years | 11 | 9 | |
| Primary location (n) | 0.258 | ||
| Midthoracic esophagus | 14 | 10 | |
| Lower thoracic esophagus | 11 | 15 | |
| Pathology grade (n) | 0.248 | ||
| Poor | 8 | 12 | |
| Moderate and well | 17 | 13 | |
| Clinical subtype (n) | 0.395 | ||
| Ulcerative type | 10 | 13 | |
| Medullary and other type | 15 | 12 | |
| Tumor size (mean ± SD) (cm2) | 8.14±5.55 | 9.21±6.59 | 0.539 |
| T stage (n) | 0.480 | ||
| T1–2 | 6 | 4 | |
| T3 | 19 | 21 | |
| N stage (n) | – | ||
| N0 | 25 | 0 | |
| N1 | 0 | 18 | |
| N2 | 0 | 6 | |
| N3 | 0 | 1 | |
| TNM stage§ (n) | – | ||
| IB | 1 | 0 | |
| IIA | 14 | 0 | |
| IIB | 10 | 1 | |
| IIIA | 0 | 3 | |
| IIIB | 0 | 20 | |
| IVA | 0 | 1 | |
†, Group 1: expression levels of miRNAs in cancer tissues without lymph node metastasis; ‡, Group 2: expression levels of miRNAs in cancer tissues with lymph node metastasis; §, postoperative pathological stage.