Table 2 NHMRC Hierarchy of Evidence
Level of evidence | Type of study design |
|---|---|
I | A systematic review of level II studies |
II | A randomised controlled trial |
III-1 | A pseudorandomised controlled trial |
| Â | (i.e. Alternate location or some other method) |
III-2 | A comparative study with concurrent controls: |
| Â | â–ª Non-randomised, experimental trial |
| Â | â–ª Cohort study |
| Â | â–ª Case-control study |
| Â | â–ª Interrupted time series with a control group |
III-3 | A comparative study without concurrent controls: |
| Â | â–ª Historical control study |
| Â | â–ª Two or more single arm study |
| Â | â–ª Interrupted time series without a parallel control group |
IV | Case series with either post-test or pre-test/post-test outcomes |