Correction: Effect of soy isoflavone supplementation on blood pressure: a meta-analysis of randomized controlled trials

Table 2 Assessment of quality of evidence for outcomes using the GRADE

The quality of evidence was evaluated at 4 levels using GRADE (high, moderate, low, very low). ^a No downgrade for risk of bias, as most studies were assessed as low risk of bias. ^b No downgrade for imprecision, as the optimal information size was met and the 95%CI did not include the null value. ^c No downgrade for inconsistency, as there was a low of heterogeneity (SBP: I ² = 0.0%, P = 0.61; DBP: I ² = 0.0%, P = 0.87). ^d Downgraded for indirectness, as the intake of sodium and potassium was not provided, which may have confounding effects. ^e No downgrade for publication bias, as there was no publication bias evaluated by the funnel plots and Egger's test. Abbreviation: DBP diastolic blood pressure, SBP systolic blood pressure, GRADE Grading of Recommendations Assessment, Development and Evaluation, WMD weighted mean difference, 95% CI 95% confidence interval.

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