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Figure 1 U-curve relationship between orthostatic blood pressure (BP) change and silent cerebral infarcts in elderly subjects with sustained hypertension. The odds ratios (mean and 95% confidence interval [CI]) for silent cerebral infarcts: (A: 0 = subjects with no infarct; 1 = subjects with one or more infarcts) or for silent multiple cerebral infarcts (B: 0 = subjects with fewer than 3 infarcts; 1 = subjects with three or more infarcts) were adjusted for age (years), gender (0 = female, 1 = male), body mass index (kg/m2), smoking status (0 = nonsmoker, 1 = current smoker), presence/absence of hyperlipidemia (0 = none, 1 = present), and 24-h systolic BP (mm Hg) using multiple logistic regression analysis (Q3 = the reference group).
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