2.
治疗后常规组和血液灌流组症状消失所需时间比较 （x±s，d）
| 组别 | n | 皮疹消失所需时间 | 消化道症状控制所需时间 |
| 常规组 | 12 | 7.8±3.4 | 9.7±5.6 |
| 血液灌流组 | 12 | 5.8±1.8 | 3.3±2.0 |
| t值 | 2.413 | 3.738 | |
| P值 | 0.025 | 0.002 |
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