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当前学科:疾病控制综合练习
题目:
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一项吸烟与膀胱癌关系的前瞻性研究结果,男性吸烟者膀胱癌发病率为48.0/10万,不吸烟者发病率为25.4/10万,其相对危险度为()。
A . 1.89/10万
B . 22.6/10万
C . 48.0/10万
D . 0.53
E . 1.89
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