Class		Systolic blood pressure (mm Hg)	Diastolic blood pressure (mm Hg)
Optimal		<120	<80
Normal		<130	<85
High normal		130 to 139	85 to 89
Hypertension
	Stage 1	140 to 159	90 to 99
	Stage 2	160 to 179	100 to 109
	Stage 3	≥180	≥110