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"
cv020496Compares a group with a given exposure or risk
factor to a group without such exposure.
Looks to see if exposure or risk factor is
associated with later development of disease.
Can be prospective (asks, โWho will
develop disease?โ) or retrospective (asks,
โWho developed the disease [exposed vs
nonexposed]?โ)+1
submitted by โergogenic22(401)
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"