What is the characteristic of a cohort in statistical studies?

In statistical studies, a cohort is defined by individuals who share common characteristics or traits. This could include factors such as age, gender, a specific health condition, or a certain experience during a particular time period. The use of cohorts allows researchers to observe trends and outcomes within a specific group, which can then be compared to other cohorts or populations.

The defining feature of a cohort is its unity through these shared traits, enabling researchers to better understand how these commonalities might influence various outcomes over time. This focused grouping is vital in longitudinal studies and helps in drawing conclusions about causality or effects related to those traits.