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Structured quality assessment shows no demonstrable effect on study efficacy and no evidence of publication bias. (A) Frequency distribution demonstrating that the structured quality score is not significant in determining intervention efficacy (2-way ANOVA p > 0.05). (B) Funnel plot, each point is a study, plotted against the effect size of that study (x-axis) and precision of that study (SE(log[OR]); y-axis). Publication bias has not been detected in this analysis.
