2.
各组豚鼠胸腺重量占其体重百分比的比较（x±s，%）
| 组别 | 胸腺重量与体重比值 |
| 正常对照组 | 0.035±0.033 |
| 哮喘组 | 0.020±0.006 |
| MK组 | 0.024±0.010 |
| OM-85BV组 | 0.021±0.009 |
| MK+OM-85BV组 | 0.025±0.010 |
| F值 | 1.10 |
| P值 | 0.37 |
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