Table 1.
Basic information of enrolled patients.
| Clinical Features | Number of patients (n) | Percentage (%) |
| Age | ||
| <=60 | 326 | 55.5% |
| >60 | 261 | 44.5% |
| Grade | ||
| G1 | 6 | 1.0% |
| G2 | 69 | 11.8% |
| G3 | 495 | 84.3% |
| G4 | 1 | 0.2% |
| Unknown | 16 | 2.7^ |
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