Smoking participants of a cohort study are more likely to drop out.It is known that the effect of asbestos on getting cancer is much stronger among smokers.When analyzing data for this study,researchers find no association between asbestos and cancer.A potential explanation for the results of the study is
A) confounding.
B) effect modification.
C) selection bias.
D) information bias.
E) specificity of association.

Question

Quizplus · Accepted Answer

Because those participants who dropped the study were particular regarding the association (smokers),those who remained in the study showed a biased attenuated association.

Smoking Participants of a Cohort Study Are More Likely to Drop