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Figure 1: Effect of drug treatments on systolic blood pressure in mild to moderate hypertensive subjects. Each point on the graph represents the average of at least 25 independent measurements. Error bars are standard error of mean. **P < 0.01, ***P < 0.001 (placebo vs. Hibiscus sabdariffa), αααP < 0.001 (placebo vs. lisinopril) and βP < 0.05 (Hibiscus sabdariffa vs. lisinopril) two-way analysis of variance with Bonferroni posttest |
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