Table 4.
Pathological characteristics of the low and high urine pH groups.
| Urine pH ≤5.5 (n=115) | Urine pH >5.5 (n=116) | P-value | |
|---|---|---|---|
| Tumor size (cm) (mean ± SD) | 3.73 ± 2.99 | 3.00 ± 2.24 | 0.092 |
| Grade (n, %) | 1.000 | ||
| High grade | 113 (98.3) | 113 (97.4) | |
| Low grade | 1 (0.9) | 1 (0.9) | |
| T stage (n, %) | 0.485 | ||
| T1-2 | 74 (64.3) | 79 (68.7) | |
| T3-4 | 41 (35.7) | 36 (31.3) | |
| N stage (n, %) | 0.476 | ||
| N0 | 90 (81.8) | 88 (85.4) | |
| N1-2 | 20 (57.1) | 15 (14.6) | |
| Lymph node density (%) | 5.29 ± 14.29 | 3.15 ± 12.05 | 0.238 |
| Perineural invasion (n, %) | 26 (22.6) | 20 (17.2) | 0.392 |
| Carcinoma in situ (n, %) | 39 (33.9) | 44 (37.9) | 0.618 |
| Lymphovascular invasion (n, %) | 27 (23.5) | 23 (19.8) | 0.607 |
| Venous invasion (n, %) | 9 (7.8) | 9 (7.8) | 1.000 |
| Lymphatic invasion (n, %) | 26 (22.6) | 20 (17.2) | 0.392 |
| Histologic variant (n, %) | 13 (11.3) | 20 (17.2) | 0.189 |