A study of the occupational exposure to HIV among health care workers recruited 33 health care workers who had become HIV-seropositive after exposure to HIV at work and 665 health care workers who had been exposed to HIV but had not become seropositive. The study found that contaminated health care workers were more likely to have been exposed to large amounts of blood and less likely to have taken the drug AZT immediately after exposure.
Which type of study is this?

Question

Quizplus · Accepted Answer

This is a retrospective, case-control observational study as it looks back at a group of individuals who have become ill (cases) and compares them to a group of individuals who have not become ill (controls) in order to identify potential risk factors.

A Study of the Occupational Exposure to HIV Among Health