. Author manuscript; available in PMC: 2018 Jan 19.

Published in final edited form as: Am J Hypertens. 2010 Mar 25;23(6):620–626. doi: 10.1038/ajh.2010.40

Table 2.

Percent (s.e.) with selected demographic characteristics

	1976–1980	1999–2002
Age in years
20–29	27.8 (0.65)	20.3 (0.79)^a
30–39	20.5 (0.55)	22.9 (0.91)
40–49	16.8 (0.42)	23.5 (0.75)^a
50–59	16.7 (0.45)	17.2 (0.65)
60–69	13.6 (0.38)	11.3 (0.53)^a
70–74	4.6 (0.28)	4.8 (0.25)
Body mass index
<18.5	3.3 (0.16)	2.0 (0.18)^a
18.5–24.9	50.8 (0.81)	33.0 (0.75)^a
25.0–29.9	31.4 (0.62)	34.2 (0.85)
30.0–34.9	10.1 (0.36)	17.9 (0.57)^a
≥35.0	4.4 (0.16)	13.0 (0.68)^a
Sex
Male	47.6 (0.50)	48.5 (0.49)
Female	52.4 (0. 50)	51.5 (0.49)
Race-ethnicity
Non-Hispanic white	82.6 (1.40)	70.4 (1.78)^a
Non-Hispanic black	10.0 (1.25)	11.2 (1.23)
Other	7.3 (0.98)	18.4 (2.11)^a
Cigarette smoking^b
Never	40.0 (0.64)	50.3 (1.23)^a
Former	22.9 (0.46)	24.0 (0.87)
Current	37.1 (0.62)	25.7 (0.90)^a
Education
<High school	32.7 (0.97)	23.5 (1.25)^a
High school	35.6 (0.83)	25.8 (1.92)^a
>High school	31.6 (1.08)	50.7 (2.22)^a

All estimates other than age-specific estimates were adjusted by the direct method to the 2000 US population using the following age groups: 20–39 years, 40–59 years, and 60–74 years.

Differences between 1976–1980 and 1999–2002 were statistically significant at P < 0.01, the α-level reflecting adjustment for multiple comparisons.

In both surveys smoking status was categorized as never smokers (defined as persons who reported not smoking at least 100 cigarettes in their life), former smokers (defined as persons who reported smoking at least 100 cigarettes in their life but were not currently smoking), and current smokers (defined as persons who reported smoking at least 100 cigarettes in their life and were currently smoking).