Clinical Research Glossary

treatment effect treatment effect


How much a study treatment changes a condition, symptom, or function.

Example of treatment effect in a sentence

Some drug studies collect information from participants to measure the treatment effect.

More Info

The treatment effect shows how much the study intervention changes what the study is measuring when compared to not getting the study treatment or getting something different.

For example, a study might measure whether, and by how much, blood pressure is lowered when participants take a new medicine.

Other info to think about when joining a study

For studies that are looking at what a study treatment does, researchers often measure the treatment effect which is connected to the main purpose of the study and the types of data being collected.

You should feel free to ask if you have any questions about how the treatment effect is being measured in the study.

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