Final answer:
High blood pressure, or hypertension, affects approximately 68 million US adults, representing about 1 in 3 adults in the United States.
Step-by-step explanation:
High blood pressure, also known as hypertension, affects approximately 68 million US adults, which accounts for about 1 in 3 adults in the United States. This condition is defined as chronic and persistent blood pressure measurements of 140/90 mm Hg or above. It is important to note that hypertension is typically a silent disorder, and individuals may fail to recognize the seriousness of their condition and fail to follow their treatment plan.