Age-adjusted percentage (top panel) and unadjusted number (bottom panel) of United States adults aged ≥ 20 years with normal blood pressure, prehypertension and hypertension by National Health and Nutrition Examination Survey (NHANES) by calendar year.
Normal blood pressure: systolic blood pressure < 120 mmHg and diastolic blood pressure < 80 mmHg without antihypertensive medication use.
Prehypertension: systolic blood pressure 120–139 mmHg with diastolic blood pressure < 90 mmHg or diastolic blood pressure 80–89 mmHg with systolic blood pressure < 140 mmHg without antihypertensive medication use.
Hypertension: systolic blood pressure ≥ 140 mmHg or diastolic blood pressure ≥ 90 mmHg and/or antihypertensive medication use.