A cohort study evaluated the association between arsenic and lung cancer. The following results were obtained: Arsenic A
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A cohort study evaluated the association between arsenic and lung cancer. The following results were obtained: Arsenic A
A cohort study evaluated the association between arsenic and lung cancer. The following results were obtained: Arsenic Arsenic (+) (-) Lung cancer 250 55 Total 1200 600 What is the crude RR? 1.7 14 O 2.3 O 3.0
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