Cohort and Case-Control Studies

Observational studies are an essential class of examine designs. To deal with a few investigative questions in plastic surgery, randomized controlled trials are not always indicated or ethical to conduct. As an alternative, observational research can be the next exceptional method to deal with those types of questions. Properlydesigned observational studies were shown to provide results just like randomized controlled trials, challenging the belief that observational studies are 2d-rate [1].