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QuickStats: Percentage Distribution* of Blood Pressure Categories Among Adults Aged >18 Years, by Race/Ethnicity --- National Health and Nutrition Examination Survey, United States, 1999--2004

* Percentages are age adjusted to the 2000 U.S. standard population.

Blood pressure categories are based on the classification recommended by the Seventh Report of the Joint National Committee on Prevention, Detection, Evaluation and Treatment of High Blood Pressure and are defined as follows: normal (systolic blood pressure <120 mm Hg and a diastolic blood pressure <80 mm Hg); pre-hypertension (systolic blood pressure 120--139 mm Hg or diastolic blood pressure 80--89 mm Hg); hypertension stage 1 (systolic blood pressure 140--159 mm Hg or diastolic blood pressure 90--99 mm Hg); and hypertension stage 2 (systolic blood pressure >160 mm Hg or diastolic blood pressure >100 mm Hg). Persons are classified into the higher blood pressure group if the systolic and diastolic values fall within more than one category. Categories do not account for blood pressure treatment status.

§ 95% confidence interval.

Blood pressure category varied substantially by race/ethnicity. Mexican Americans and non-Hispanic whites were more likely to have normal blood pressure compared with non-Hispanic blacks. Conversely, higher percentages of non-Hispanic blacks had hypertension stage 1 and hypertension stage 2 compared with non-Hispanic whites and Mexican Americans.

SOURCE: National Health and Nutrition Examination Survey 1999--2004. Available at

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Date last reviewed: 6/21/2007




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