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Association between concentrations of increased serum direct bilirubin and lymph node metastasis n (%)
| Direct bilirubin/DBil (μmol/L) | Patients with LNM | Patients without LNM | OR (95%CI) | P value |
| DBil ≤ 1.50 | 50 (43.1) | 66 (56.9) | 1 (reference) | - |
| 1.50 < DBil ≤ 2.50 | 67 (46.9) | 76 (53.1) | 1.164 (0.711-1.905) | 0.547 |
| 2.50 < DBil ≤ 3.50 | 60 (50.4) | 59 (49.6) | 1.342 (0.803-2.244) | 0.261 |
| DBil > 3.50 | 54 (59.3) | 37 (40.7) | 1.926 (1.104-3.362) | 0.020 |
LNM: Lymph node metastasis.
