对混杂干扰因素进行分析说明的论文有5篇，占5．6％；
There were analysis and explanation of mixed interfering factors only in 5 papers (5. 6% ).
药物与不良反应联系强度的判定必须排除混杂因素的干扰，找到内在的、本质的联系。
As connection intensity of drug and and adverse reactions is judged, the confuse factor disturbance must be removed and the internal and essential connection. must be probed.
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