问题
单项选择题
在一项膀胱癌与吸烟关系的前瞻性队列研究中，发现男性吸烟者膀胱癌发病率为48.0/10万，不吸烟者为25.4/10万。根据此资料：
归因危险度为
A．22.6/10万
B．1.89
C．48.0
D．3.93%
E．无法计算
答案
参考答案：A
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在一项膀胱癌与吸烟关系的前瞻性队列研究中，发现男性吸烟者膀胱癌发病率为48.0/10万，不吸烟者为25.4/10万。根据此资料：
归因危险度为
A．22.6/10万
B．1.89
C．48.0
D．3.93%
E．无法计算
参考答案：A
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