Fig. 1. Serial changes in systolic blood pressure and diastolic blood pressure. Data are presented as mean and SD. For both systolic blood pressure and diastolic blood pressure, there was no significant treatment × time interaction (  P > 0.05). For systolic blood pressure, there was a significant between-groups effect (systolic blood pressure averaged across time was greater in group 1  versus group 0;  P =0.02). For diastolic blood pressure, the between-groups effect was not significant (  P =0.11).