3.
净化组患儿净化前后IL-6和TNF-γ水平比较 （n=22，x±s，pg/mL）
| 时间 | IL-6 | TNF-α |
| 血液净化前 | 84±36 | 12.4±2.4 |
| 血液净化后48 h | 53±28 | 10.7±2.2 |
| t值 | 3.433 | 6.098 |
| P值 | 0.002 | < 0.001 |
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