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下面哪项有关选择偏倚的描述是正确的()。

单选题
2021-12-29 13:31
A、增加样本大小能减小选择偏倚
B、队列研究不会发生选择偏倚,因为研究开始时对象均是无病者
C、研究某种职业暴露与人群患病关系时,无法避免选择偏倚
D、现况研究和病例对照研究比队列研究更易发生选择偏倚
E、如果病例和对照均来自一所医院,则可以避免选择偏倚
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正确答案
D

试题解析

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