Grades of Recommendation

NASS uses the following grades of recommendation in its evidence analysis and research/clinical care projects. ​ ​​

Grades of Recommendation for Summaries or Reviews of Studies



A:

Good evidence (Level I Studies with consistent finding) for or against recommending intervention.


B:

Fair evidence (Level II or III Studies with consistent findings) for or against recommending intervention.


C:

Poor quality evidence (Level IV or V Studies) for or against recommending intervention.


I:

There is insufficient or conflicting evidence not allowing a recommendation for or against intervention.