Table 1.

Certainty of Evidence

Evidence Quality	Definition
High	High confidence that the estimated effect is close to the true effect.
Moderate	Moderate confidence that the estimated effect is close to the true effect, but with a chance that the true effect is considerably different.
Low	Low confidence in the estimated effect. Higher likelihood that the true effect is considerably different from the estimated effect.
Very low	Very low confidence in the estimated effect. High likelihood that the true effect is considerably different from the estimated effect.