Observational study
« Back to Glossary IndexAn observational study is a type of clinical research in which investigators assess health outcomes in groups of participants without the investigator changing the participants’ routine medical care or lifestyle. Similar to clinical trials, observational studies have a research plan or protocol created by the investigators. A registry and a natural history study are types of observational study.
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ClinicalTrials.gov Learn about Clinical Trials: Observational Studies