FIGURE 9.

Forest plots for randomized controlled trials of chronic vinegar intake on fasting blood glucose. Chronic interventions with vinegar had a main effect of −1.60 (95% CI, −4.30 to 1.09; P = 0.24) on the postintervention fasting blood glucose iAUC (n = 143). A random-effects model was used to calculate Hedge's g (squares), 95% CIs (horizontal lines), and summary effects (diamond). The study weight (expressed as a percentage) indicates the relative contribution of an individual study to the overall pooled effect size. Between-study heterogeneity was calculated using the I² statistic. A P value ≤ 0.05 was considered statistically significant. Abbreviations: iAUC, incremental AUC; H, healthy volunteers; T2D, type 2 diabetes.