Chart 3.4. – Classification of blood pressure from in-office measurement, ages 18 and up.

Classification*	SBP (mm Hg)		DBP (mm Hg)
Optimum BP	< 120	and	< 80
Normal BP	120-129	and/or	80-84
Prehypertension	130-139	and/or	85-89
Stage 1 HT	140-159	and/or	90-99
Stage 2 HT	160-179	and/or	100-109
Stage 3 HT	≥ 180	and/or	≥ 110

BP: blood pressure; DBP: diastolic blood pressure; HT: hypertension; SBP: systolic blood pressure. * Classification follows office BP and the highest BP level, either systolic or diastolic. ** Isolated systolic HT, characterized by SBP ≥ 140 mm Hg and DBP < 90 mm Hg, is classified as 1, 2 or 3, according to SBP values at the intervals indicated. *** Isolated diastolic HT, characterized by SBP < 140 mm Hg and DBP ≥ 90 mm Hg, is classified as 1, 2 or 3, according to SBP values at the intervals indicated.