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Figure 3 Differences between pretreatment and treatment pressures for both office blood pressure measurement (OBPM) and home blood pressure measurement (HBPM) as derived from eight studies with a total of 3,256 subjects (Table 5). Results for systolic (closed symbols, S) and diastolic (open symbols, D) blood pressure are presented as the mean difference with the 95% confidence interval; OBPM differences were significantly greater than HBPM differences for both systolic and diastolic blood pressure (p < 0.001).