What type of study compares a group trying to quit smoking with a group that does not?

The correct response is focused on a cohort study, which is designed to compare outcomes between a group of individuals who share a common characteristic—in this case, those trying to quit smoking—and a comparison group who do not attempt to quit. This type of study allows researchers to observe how certain behaviors or exposures (like smoking cessation efforts) may influence outcomes over time.

In a cohort study, participants are typically followed over a period, and their progress or health outcomes are noted, allowing researchers to assess the differences between the groups in terms of smoking cessation success, health improvements, or other relevant metrics. This type of longitudinal observation can help establish associations and correlations that inform public health interventions and smoking cessation programs.

Other types of studies, such as case studies, randomized clinical trials, and quasi-experimental designs, have different methodologies and methodologies, focusing on specific populations or interventions without the same comparative framework emphasized in cohort studies.