Untreated Isolated Sytolic Hypertension among Middle-Aged and Old Adults in the United States: Trends in the Prevalence by Demographic Factors During 1999–2010

Table 1

Characteristics of participants in NHANES 1999–2010, USA.

Characteristics	Mean or percentage (95% CI)
	Overall	NHANES 1999–2004	NHANES 2005–2010
Age (years)	54.3 (53.9, 54.6)	54.4 (54.0, 54.8)	54.2 (53.7, 54.7)
Gender
Female, %	51.3 (50.3, 52.2)	51.2 (49.7, 52.7)	51.3 (50.1, 52.5)
Race
Hispanic, %	10.0 (8.2, 11.8)	9.7 (6.8, 12.7)	10.2 (8.1, 12.4)
Non-Hispanic white, %	77.7 (75.5, 79.9)	78.7 (75.4, 81.9)	76.7 (73.5, 79.9)
Non-Hispanic black, %	7.8 (6.7, 8.8)	7.6 (6.1, 9.1)	7.9 (6.5, 9.4)
Other races, %	4.5 (3.9, 5.3)	4.0 (3.0, 4.9)	5.2 (4.1, 6.3)
Education
High school or below, %	45.1 (43.3, 46.9)	46.8 (44.1, 49.4)	43.5 (40.9, 46.1)

Note: data were age-adjusted (except for age-specific estimates) by direct standardization to the 2000 projected US population.
NHANES: National Health and Nutrition Examination Survey; CI: confidence interval.