The distinguishing feature of an intervention study is that the investigators assign subjects to a treatment (or "exposure") in order to establish actively treated groups of subjects and a comparison group.

What is an intervention study example?

An example would be a study in which the investigator randomly assigns the participants to receive either aspirin or a placebo for a specific duration to determine whether the drug has an effect on the future risk of developing cerebrovascular events.

What does intervention mean in a research study?

An intervention is a combination of program elements or strategies designed to produce behavior changes or improve health status among individuals or an entire population. Interventions that include multiple strategies are typically the most effective in producing desired and lasting change.