Fig. 2

Changes in mean SBP and DBP by group at 4, 8, and 12 weeks. Each midpoint and rod represent the mean and standard deviation. Presented p-value is the result of the difference test between the groups using the mixed model for the repeated measured data. The SBP or DBP changes from baseline to each week are the response variables, and the group (intervention vs. control), baseline blood pressure level, level of hospital (clinic or hospital), time point (4/8/12 weeks), and interaction between the group and time point are the fixed effects. Moreover, the participants are the random effects. An unstructured covariance structure is assumed to model the within participant errors. SBP, systolic blood pressure; DBP, diastolic blood pressure