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 than those who had not become seropositive.
Which type of study design is this?

Question

Quizplus · Accepted Answer

This study design is a retrospective, case-control observational study because it looks back in time to compare health care workers who became HIV-seropositive (cases) with those who did not (controls) based on their exposure to HIV and other factors.

A Study of the Occupational Exposure to HIV Among Health