Levels of evidence and your therapeutic study: what’s the difference with cohorts, controls, and cases?

An Analysis of the Quality of Cartilage Repair Studies

“…The effort by major orthopaedic journals to more clearly mark articles on the ground of methodological quality is highly appreciated 15,19 . The finding of a strong correlation between the Coleman Methodology Score and the level-of-evidence rating with a progressively smaller variance with higher levels of evidence supports this method.…”

“…A score of 100 indicates that the study largely avoids chance, various biases, and confounding factors. The studies were also assessed with use of the level-of-evidence rating introduced in the American Volume of The Journal of Bone and Joint Surgery in 2003 15 and recently also in Arthroscopy 19 . The studies were also assessed with use of the level-of-evidence rating introduced in the American Volume of The Journal of Bone and Joint Surgery in 2003 15 and recently also in Arthroscopy 19 .…”

Surgery and Rehabilitation Treatment Options for Ulnar Collateral Ligament Injuries of the Elbow for Baseball Athletes: A Systematic Review

“…36 Level of evidence-II. 37 7. Randomized control trial-A trial which allows for a difference to be seen between the treatment and control groups.…”

“…Classified as being the highest level of evidence-I. 37 8. Reconstruction-The use of a tendon graft, autograph or allograft, to form a new ligamentous structure.…”

“…36 Level of evidence-III. 37 11. Sensitivity-Classification of a subject who has the disease/injury/disorder.…”