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Related Concept Videos

Observational Studies01:11

Observational Studies

Observational studies are a type of analytical study where researchers observe events without any interventions. In other words, the researcher does not influence the response variable or the experiment's outcome.
There are three types of observational studies – Prospective, retrospective, and cross-sectional.
Prospective Study
Prospective studies, also known as longitudinal or cohort studies, are carried out by collecting future data from groups sharing similar characteristics. One example of...

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Commentary: Can observational studies provide suitable evidence for spine interventions?

Jeffrey A Rihn1

  • 1Department of Orthopaedic Surgery, Thomas Jefferson University Hospital, The Rothman Institute, Philadelphia, PA 19107, USA. Jrihno16@yahoo.com

The Spine Journal : Official Journal of the North American Spine Society
|June 5, 2012
PubMed
Summary

No abstract available in PubMed .

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