Browse the glossary:
controlled before and after study, CBA study,
In controlled before-after studies outcomes are measured before and after a treatment in a group that receives the treatment, and in another group that does not receive the treatment, or that receives a different treatment. Controlled before-after studies typically have a high risk of bias because of other differences between the groups that are being compared (confounders).
uncontrolled before-after study
If you feel that this definition hasn't helped you to understand the term, click on our monkey to let us know.