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| <60y | ≥60y | Total | |
| N (%) | N (%) | N (%) | |
| Nephritis | 28(5.4) | 18(6.3) | 46(5.8) |
| Kidney neoplasm | 132(25.6) | 89(31.3) | 221(27.6) |
| Hematological disease | 101(19.6) | 10(3.5)** | 111(13.9) |
| Hypertension | 70(13.6) | 92(32.4)** | 162(20.3) |
| Coronary heart disease | 7(1.4) | 28(9.9)** | 35(4.4) |
| Diabetic mellitus | 26(5.0) | 58(20.4)** | 84(10.5) |
P<0.01 compared with the young.
