User Tools

Site Tools


level_of_evidence_1

Level of Evidence 1

Level of Evidence 1

Level I: Evidence obtained from at least one properly designed randomized controlled trial.

Level 1a

Evidence from large randomized clinical trials (RCTs) or systematic reviews (including meta-analyses) of multiple randomized trials which collectively has at least as much data as one single well-defined trial.

Level 1b

Evidence from at least one “All or None” high quality cohort study; in which ALL patients died/failed with conventional therapy and some survived/succeeded with the new therapy (for example, chemotherapy for tuber- culosis, meningitis, or defibrillation for ventricular fibrillation); or in which many died/failed with conventional therapy and NONE died/failed with the new therapy (for example, penicillin for pneumococcal infections).

Level of Evidence 1C.

Level 1d

Evidence from at least one RCT.

level_of_evidence_1.txt · Last modified: 2017/11/08 18:42 by administrador