Figure 4.

Evening postprandial blood glucose responses following the polyphenol-rich extract, rice flour and cellulose for the total study population (a) and grouped by ethnicity (b) and sex (c). Data are mean with standard deviation error bars. Independent samples t tests showed significantly higher peak blood glucose concentrations in males than females following cellulose (p = 0.024) and polyphenol-rich extract (p = 0.015). A one-way repeated measures ANOVA (analysis of variance) showed significant differences between the three treatments among females (p = 0.018).