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 2

Prevalence and changes of untreated isolated systolic hypertension by age, gender, race, and education in NHANES 1999–2010, USA.

Characteristics	Prevalence (95% CI)
	Overall, %	NHANES 1999–2004, %	NHANES 2005–2010, %
Age (years)
40–64	15.6 (13.5, 17.7)	16.2 (13.0, 19.6)	15.1 (12.5, 17.6)
≥65	33.1 (31.1, 35.1)	37.7 (34.8, 40.6)	28.0 (25.1, 30.9)^*
Gender
Male	13.3 (12.1, 14.4)	13.8 (12.1, 15.5)	12.6 (11.1, 14.1)
Female	16.9 (15.8, 18.1)	19.5 (17.8, 21.1)	14.3 (12.7, 15.8)^*
Race
Hispanic	17.3 (14.6, 19.9)	18.3 (14.0, 22.7)	16.0 (13.4, 18.5)
Non-Hispanic white	14.5 (13.4, 15.6)	16.2 (14.6, 17.9)	12.7 (11.3, 14.2)^*
Non-Hispanic black	20.4 (18.4, 22.3)	21.7 (19.2, 24.2)	18.9 (15.8, 22.0)
Other races	14.0 (9.9, 18.0)	15.7 (8.1, 23.3)	12.6 (8.2, 17.0)
Education
High school or below	17.6 (16.3, 18.8)	18.8 (16.7, 20.9)	16.0 (14.5, 17.5)
College or above	13.1 (11.8, 14.4)	14.9 (13.2, 16.7)	11.4 (9.6, 13.3)

Note: the prevalence of isolated systolic hypertension was 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.
^*indicates that the difference in the prevalence of untreated ISH between 1999–2004 and 2005–2010 is significant at the 0.05 level.