Table 2. Correlation between Ki-67 index and clinicopathological characteristics in patients with small cell carcinoma of the esophagus.
| Characteristics | Low Ki-67 index, N (%) | High Ki-67 index, N (%) | P value |
|---|---|---|---|
| Mean age (years) | 62.3 ± 8.1 | 58.5 ± 8.9 | 0.169 |
| Gender | 1.00 | ||
| Male | 12 (27.3) | 21 (47.7) | |
| Female | 4 (9.1) | 7 (15.9) | |
| Tumor location | 0.733 | ||
| Upper | 1 (2.3) | 3 (6.8) | |
| Middle | 11 (25.0) | 16 (36.4) | |
| Lower | 4 (9.1) | 9 (20.5) | |
| Histology homology | 0.764 | ||
| Pure | 11 (25.0) | 18 (40.9) | |
| Mixed | 5 (11.4) | 10 (22.7) | |
| Lymphovascular invasion | 0.868 | ||
| Yes | 14 (31.8) | 24 (54.5) | |
| No | 2 (4.5) | 4 (9.1) | |
| Pathological TNM stage | 0.838 | ||
| Stage I | 3 (6.8) | 7 (15.9) | |
| Stage II | 7 (15.9) | 10 (22.7) | |
| Stage III | 6 (13.6) | 11 (25.0) | |
| pT stage | 0.491 | ||
| T1 | 4 (9.1) | 9 (20.5) | |
| T2 | 7 (15.9) | 9 (20.5) | |
| T3 | 5 (11.4) | 7 (15.9) | |
| T4 | 0 (0) | 3 (6.8) | |
| pN stage | 0.545 | ||
| N0 | 6 (13.6) | 10 (22.7) | |
| N1 | 5 (11.4) | 11 (25.0) | |
| N2 | 5 (11.4) | 5 (11.4) | |
| N3 | 0 (0) | 2 (4.5) | |
| Adjuvant therapy | 0.690 | ||
| Yes | 7 (15.9) | 14 (31.8) | |
| No | 9 (20.5) | 14 (31.8) |