From: Mckeon, P.O., Medina, J.M., and Hertel, J. Hierarchy of Research Design in Evidence-Based Sports Medicine. (2006). Athletic Therapy Today, 11, 4. pp.42-45.
Levels of Evidence: Oxford Centre of Evidence-Based Medicine Model
from: Medina, J.M., Mckeon, P.O. and Hertel, J. Rating the Levels of Evidence in Sports-Medicine Research. (2006). Athletic Therapy Today, 11, 5. pp.45-48
Levels of Evidence: SORT Model (Am. Acad. of Family Physicians)
from: Medina, J.M., Mckeon, P.O. and Hertel, J. Rating the Levels of Evidence in Sports-Medicine Research. (2006). Athletic Therapy Today, 11, 5. pp.45-48