Univariate analysis of potential risk characteristics for lymph node metastasis.
| Characteristics | Lymph node metastasis positive number (%) | P |
|---|---|---|
| Gender | ||
| Male (n=49) | 6 (12.2) | 0.523 |
| Female (n=21) | 4 (19.0) | |
| Age, years | ||
| <60 (n = 65) | 9 (13.8) | 0.748 |
| ≥60 (n = 5) | 1 (20.0) | |
| Family history | ||
| Positive (n = 1) | 0 | 0.704 |
| Negative (n = 69) | 10 (14.5) | |
| Number of tumors | ||
| Single (n = 68) | 10 (14.7) | 0.588 |
| Multitude (n = 2) | 0 | |
| Location | ||
| Upper (n = 16) | 3 (20.0) | 0.683 |
| Middle (n=4) | 0 | |
| Lower (n = 50) | 7 (14.0) | |
| Tumor size, cm | ||
| ≤2 (n=45) | 2 (4.4) | 0.008 |
| >2 (n=25) | 8 (32.0) | |
| Macroscopic type | ||
| I (n=0) | 0 | 0.171 |
| II (n=55) | 8 (13.6) | |
| III (n = 15) | 2 (40.0) | |
| Depth of invasion | ||
| Mucosa (n=46) | 2 (4.3) | 0.006 |
| Submucosa (n = 24) | 8 (33.3) | |
| Lymphatic vessel involvement | ||
| Positive (n=11) | 6 (54.5) | 0.001 |
| Negative (n=59) | 4 (6.8) |