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Figure 1 Differences between systolic (left) and diastolic (right) office blood pressure measurement (OBPM) and home blood pressure measurement (HBPM) as a function of age in patients without antihypertensive treatment. Results were derived from 18 studies with a total of 6,979 subjects (Table 3). The relationship was statistically significant for systolic pressure only (p = 0.036). The regression line was calculated for equal proportions of men and women, and studies were weighted for the number of subjects.