Table 3.

Modified GRADE approach for evaluation of the overall quality of evidence [16]

Quality of evidence	Definition
High	We are very confident that the true measurement property lies close to that of the estimate of the measurement property
Moderate	We are moderately confident in the measurement property estimate: the true measurement property is likely to be close to the estimate of the measurement property, but there is a possibility that it is substantially different
Low	Our confidence in the measurement property estimate is limited: the true measurement property may be substantially different from the estimate of the measurement property
Very low	We have very little confidence in the measurement property estimate: the true measurement property is likely to be substantially different from the estimate of the measurement property

Reused from Prinsen et al. [14] under a Creative Commons Attribution 4.0 (http://creativecommons.org/licenses/by/4.0/)