Standards to assess high blood pressure, without regard to age, have been established by the World Health
Organization (WHO), as shown in the chart below.
Reference Material: Journal of Hypertension 1999, Vol 17 No.2
mmHg
110
105
100
95
90
85
80
PRESSURE BAR INDICATOR
Grade 3 hypertension (severe)
Grade 2 hypertension (moderate)
Grade 1 hypertension (mild)
High-normal
Normal
Optimal
120
130
Systolic blood pressure
140
150
160
53
170
180
mmHg