A team of researchers hypothesize that watching THE WIGGLES might lead to epilep

Question

A team of researchers hypothesize that watching THE WIGGLES might lead to epilepsy in childhood. Children with and without epilepsy are compared on the basis of hours spent watching THE WIGGLES. Which of hte following statements best characterizes the assessment of data in this case-control study? a. Absolute and relative measures of risk can be derived b. The risk ratio cannot be calculated directly c. The temporal association between exposure and outcome can be established with certainty d. The use of healthy controls ensures external validity totally lost please help!!!!! why are the other answers wrong?

Explanation / Answer

c. The temporal association between exposure and outcome can be established with certainty

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