Figure 2. Distribution of masked hypertension across clinic blood pressure categories in the normal range (<140/90 mm Hg) based on the mean of nine readings. Clinic blood pressure levels in the normal range were categorized as follows: mean SBP ≥130 mm Hg or mean DBP ≥85 mm Hg (with mean SBP <140 mm Hg and mean DBP <90 mm Hg); mean SBP ≥120 mm Hg or mean DBP ≥80 mm Hg (with mean SBP <130 mm Hg and mean DBP <85 mm Hg); mean SBP ≥110 mm Hg or mean DBP ≥75 mm Hg (with mean SBP <120 mm Hg and mean DBP <80 mm Hg); mean SBP ≥100 mm Hg or mean DBP ≥70 mm Hg (with mean SBP <110 mm Hg and mean DBP <75 mm Hg); and mean SBP <100 mm Hg and mean DBP <70 mm Hg. Of the 769 participants with normal clinic blood pressure, a total of 287 participants had prehypertension and 482 had optimal clinic blood pressure levels. The risk of masked hypertension was disproportionally concentrated among those participants with prehypertension. CBP, clinic blood pressure; DBP, diastolic blood pressure; MHT, masked hypertension; SBP, systolic blood pressure.