+A **Case Control Study** is an observational research method that begins by identifying individuals with a particular outcome (cases) and a comparison group without it (controls). Researchers then retrospectively examine past exposures, aiming to find associations that may have led to the outcome. This design is a key type of [Observational Study](/wiki/observational_study), often employed when a [Cohort Study](/wiki/cohort_study) would be impractical for rare conditions.
+## See also
+- [Epidemiology](/wiki/epidemiology)
+- [Risk Factor](/wiki/risk_factor)
+- [Bias](/wiki/bias)
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