Table 1. Clinicopathological features of ESCC cases in this study.
| Shandong | Gansu | ||
|---|---|---|---|
| N (%) | N (%) | P-value* | |
| Total | 33 (100) | 26 (100) | |
| Gender | 0.740 | ||
| Male | 26 (79) | 22 (85) | |
| Female | 7 (21) | 4 (15) | |
| Age (years) a | 0.562 | ||
| <55 | 10 (31) | 5 (19) | |
| 55–64 | 10 (31) | 8 (31) | |
| ⩾65 | 12 (38) | 13 (50) | |
| Differentiation grade | <0.001 | ||
| Well | 20 (61) | 2 (8) | |
| Moderate | 8 (24) | 14 (54) | |
| Poor | 5 (15) | 10 (38) | |
| p16INK4a protein expression (%) | 0.303 | ||
| <10 | 23 (70) | 17 (65) | |
| 10–79 | 3 (9) | 6 (23) | |
| ⩾80 | 7 (21) | 3 (12) | |
| p53 protein expression (%) | 0.064 | ||
| <10 | 19 (58) | 9 (35) | |
| 10–79 | 7 (21) | 4 (15) | |
| ⩾80 | 7 (21) | 13 (50) |
*P-values were obtained by Fisher's exact test.
a
Information on age was missing in a case.