In 1999 the army of country Z started to collect data from all their recruits.As part of the process,they conducted a full physical examination in which audition was measured and reported as normal hearing,low hearing loss,and severe hearing loss.Unfortunately,5 years later country Z went into a war with country Y.In 2018 a researcher from University U decided to conduct a study in which she investigated the association between hearing loss and suffering a war injury.What type of study design is being illustrated in this example?

Question

Quizplus · Accepted Answer

The study design described in this question is a retrospective cohort in which the exposure to hearing loss was ascertained from past records collected by the army.

In 1999 the Army of Country Z Started to Collect