Figure 1: Trends in reasons for uncontrolled blood pressure among US adults from 1999 to 2018.

Unawareness to hypertension was defined by answering no to the question “Have you ever been told by a doctor or other health professional that you had hypertension, also called high blood pressure?” Not treated with antihypertensive medication was defined by answering no to either of the questions “Because of your high blood pressure/hypertension, have you ever been told to take prescribed medicine?” or “Are you now taking prescribed medicine?” Treated with antihypertensive medication was defined as taking antihypertensive medication with uncontrolled blood pressure.