Cohort Studies

**Definition:** Studies in which subsets of a defined population are identified. These groups may or may not be exposed to factors hypothesized to influence the probability of the occurrence of a particular disease or other outcome. Cohorts are defined populations which, as a whole, are followed in an attempt to determine distinguishing subgroup characteristics.

**Tree numbers:** - E05.318.372.500.750 - N05.715.360.330.500.750 - N06.850.520.450.500.750

**Synonyms:** - Studies, Concurrent - Concurrent Studies