Table 1

 Level of evidence table (Bandolier4)

I Strong evidence from at least one systematic review of multiple well designed randomised controlled trials.
II Strong evidence from at least one properly designed randomised controlled trial of appropriate size.
III Evidence from well designed trials without randomisation, single group pre-post, cohort, time series or matched case-controlled studies.
IV Evidence from well designed non-experimental studies from more than one centre or research group.
V Opinions of respected authorities, based on clinical evidence, descriptive studies or reports of expert committees.
Adapted with permission from Bandolier4.

  • Adapted with permission from Bandolier4.