The Jadad scale, sometimes known as Jadad scoring or the Oxford quality scoring system, is a procedure to independently assess the methodological quality of a clinical trial. It is the most widely used such assessment in the world, and as of 2008, its seminal paper has been cited in over 3000 scientific works.
The Jadad scale is named after Alejandro Jadad-Bechara, a Colombian physician who worked as a Research Fellow at the Oxford Pain Relief Unit, Nuffield Department of Anaesthetics, at the University of Oxford. Jadad felt that the randomised controlled trial was of great importance for the advancement of medical science, describing it in a 2007 book as "one of the simplest, most powerful and revolutionary forms of research". He and his team outlined their views of the effectiveness of blinding on published studies in a 1996 paper in the Journal of Controlled Clinical Trials. An appendix to the paper described a scale allocating trials a score of between zero (very poor) and five (rigorous).
Read more about Jadad Scale: Background, Jadad Questionnaire, Uses, Criticism, See Also
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