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Table 2 Categories of quality (certainty) of evidence (adapted from GRADE [16])

From: Adolescent polycystic ovary syndrome according to the international evidence-based guideline

HighVery confident that the true effect lies close to that of the estimate of the effect
ModerateModerate confidence in the effect estimate – the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different
LowLimited confidence in the effect estimate – the true effect may be substantially different from the estimate of the effect
Very lowVery little confidence in the effect estimate – the true effect is likely to be substantially different from the estimate of effect