In measuring an exposure in a prospective cohort study design, which biases are most readily avoidable?
A)Misclassification
B)Interviewer bias
C)Recall bias
D)Healthy worker effect
E)None of the above

Question

Quizplus · Accepted Answer

Recall bias cannot occur for measures of a participant's state at the
point of entry into a cohort study, as they are unaware of their future disease history so
cannot be influenced by it; and this is also true for an interviewer at baseline.In
contrast all measures may be misclassified (A) at any point in a study and the healthy
worker effect (D) influences the number of health events the cohort experiences.

In Measuring an Exposure in a Prospective Cohort Study Design