2.
不同年龄不同种类吸入性过敏原阳性率比较
| [例（%）] | |||||
| 年龄 | 例数 | 尘螨 | 动物皮屑 | 霉菌 | 花粉 |
| < 1岁 | 62 | 17(27) | 3(5) | 6(10) | 5(8) |
| 1~3岁 | 73 | 10(14) | 0(0) | 7(10) | 4(5) |
| χ2(χc2)值 | 3.951 | - | 0 | (0.064) | |
| P值 | 0.054 | 0.094 | 1.000 | 0.731 | |
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