In a study of 62,641 female nurses the amount of selenium in toenail clippings was measured, and then they were followed for a number of years to determine the risk of cancer. Which of the following applies to this study?
A) Randomized Experiment
B) Prospective Study
C) Placebo Control
D) Single Blind

Question

Quizplus · Accepted Answer

This is a prospective study because it involves following a group of individuals over time to see how their exposure to a certain factor (in this case, selenium levels) affects their risk of developing a condition (cancer).

In a Study of 62,641 Female Nurses the Amount of Selenium