A cohort study compares a group with a given exposure (cigarette smoking) to a group without such exposure. It then looks to see if exposure or risk factor is associated with later development of disease.
"does smoking lead to COPD"
on the other hand,
a case-control study looks at those with the disease vs without to see if there is a difference between prior exposure or risk factor
"Did people with COPD smoke"
to snoo-finity ... and beyond!
submitted by ergogenic22(28), 2019-08-12T00:49:10Z
A cohort study compares a group with a given exposure (cigarette smoking) to a group without such exposure. It then looks to see if exposure or risk factor is associated with later development of disease. "does smoking lead to COPD"
on the other hand, a case-control study looks at those with the disease vs without to see if there is a difference between prior exposure or risk factor "Did people with COPD smoke"