Observational Study - Degree of Usefulness and Reliability

Degree of Usefulness and Reliability

Although observational studies cannot be used as reliable sources to make statements of fact about the "safety, efficacy, or effectiveness" of a practice, they can still be of use for some other things:

"hey can: 1) provide information on “real world” use and practice; 2) detect signals about the benefits and risks of... use in the general population; 3) help formulate hypotheses to be tested in subsequent experiments; 4) provide part of the community-level data needed to design more informative pragmatic clinical trials; and 5) inform clinical practice."

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