evidence based medicine (EBM)
levels of evidence
Level I: Evidence obtained from at least one properly designed randomized controlled trial.
Level II-1: Evidence obtained from well-designed controlled trials without randomization.
Level II-2: Evidence obtained from well-designed cohort or case-control analytic studies, preferably from more than one center or research group.
Level II-3: Evidence obtained from multiple time series with or without the intervention. Dramatic results in uncontrolled trials might also be regarded as this type of evidence.
Level III: Opinions of respected authorities, based on clinical experience, descriptive studies, or reports of expert committees.
classes of recommendations
|class I ||evidence &/or general agreement that Rx or procedure is beneficial, useful and effective
|class II ||conflicting evidence or opinion regarding usefulness or effectiveness
| class IIa ||weight of evidence is in favour of usefulness or effectiveness
| class IIb ||usefulness or effectiveness is less well established
|class III ||not recommended as evidence or opinion suggests NOT useful or effective, and may cause harm
examples of EBM in this wiki
ebm.txt · Last modified: 2014/04/13 05:44 by gary1