Table 1.

Basic clinical characteristics of hypertensive subjects according to groups

Parameter	Placebo	Hibiscus sabdariffa	Lisinopril
Age (years)	48.90 ± 5.06	49.92 ± 3.40	53.25 ± 3.25
Body mass index (kg/m2)	27.27 ± 1.50	28.10 ± 2.48	27.87 ± 2.45
Change in systolic blood pressure after 4 weeks (mmHg)	−1.10 ± 0.05	−17.08 ± 2.01*α	−12.60 ± 1.15*
Change in diastolic blood pressure after 4 weeks (mmHg)	−0.40 ± 0.02	−12.12 ± 1.04*	−9.20 ± 1.10*
Change in Mean arterial pressure after 4 weeks (mmHg)	−0.95 ± 0.20	−13.68 ± 1.82*	−10.31 ± 1.14*

*Significant at P < 0.001 with respect to placebo; ^αSignificant at P < 0.05 with respect to lisinopril

Results are presented as the mean ± standard error of the mean. Two-way analysis of variance was used to compare groups