Further research needed

The evidence base for this intervention is made up of largely poor quality studies for this outcome

Explanation:

Majority of studies are appraised as being of poor quality, but are still showing an effect for the outcome in favour of the intervention
OR
Majority of studies are appraised as being of poor quality and of no effect for this outcome in favour of the intervention

Further considerations:

More robust primary research and thorough evaluation needed

The evidence base is inconsistent. There may be some evidence supporting the use of this intervention for this outcome, but it is not conclusive

Explantation:

The results of studies are inconsistent with no clear majority in favour or not in favour of the intervention, regardless of quality

Further considerations:

More robust primary research and thorough evaluation needed

There is a lack of evidence for this intervention for this outcome

Explantation:

Only one study has been identified for this intervention (regardless of quality) 

Further considerations:

More primary research and thorough evaluation needed