TABLE 1—
Sample Characteristics: Behavioral Risk Factor Surveillance System, 1986–2002
| BMI, 1986–1990 | BMI, 1991–1995 | BMI, 1996–2002 | |||||
| % in Sample (SD), 1986–2002 (N = 1 879 862) | Mean (SD) | 80th Percentile (95% CI) | Mean (SD) | 80th Percentile (95% CI) | Mean (SD) | 80th Percentile (95% CI) | |
| Education | |||||||
| No high school diploma | 14.4 (35.1) | 25.7 (4.9) | 29.2 (29.1, 29.2) | 26.2 (5.1) | 29.9 (29.8, 30.0) | 27.1 (5.7) | 31.2 (31.1, 31.2) |
| High school diploma | 32.7 (46.9) | 24.8 (4.4) | 27.9 (27.9, 28.0) | 25.5 (4.7) | 28.9 (28.8, 28.9) | 26.5 (5.3) | 30.2 (30.1, 30.2) |
| Some college | 26.9 (44.3) | 24.4 (4.2) | 27.4 (27.3, 27.4) | 25.2 (4.7) | 28.3 (28.3, 28.3) | 26.2 (5.2) | 29.9 (29.8, 29.9) |
| College graduation | 25.9 (43.8) | 24.2 (3.8) | 26.7 (26.6, 26.9) | 24.8 (4.1) | 27.5 (27.5, 27.5) | 25.6 (4.6) | 28.8 (28.7, 28.8) |
| Race/ethnicity | |||||||
| Non-Hispanic White | 76.6 (42.3) | 24.6 (4.2) | 27.5 (27.4, 27.5) | 25.2 (4.6) | 28.3 (28.3, 28.3) | 26 (5.0) | 29.5 (29.5, 29.5) |
| Non-Hispanic Black | 9.3 (29.1) | 25.8 (5.0) | 29.6 (29.5, 29.8) | 26.7 (5.3) | 30.7 (30.5, 30.7) | 27.8 (5.9) | 32.2 (32.1, 32.3) |
| Hispanic | 9.8 (29.7) | 25 (4.3) | 28.1 (27.9, 28.2) | 25.7 (4.6) | 28.9 (28.7, 29.0) | 26.8 (5.2) | 30.2 (30.1, 30.2) |
| Other | 4 (19.6) | 23.5 (4.0) | 27.1 (26.8, 27.3) | 24.2 (4.4) | 28 (27.8, 28.2) | 25.1 (4.9) | 29.4 (29.3, 29.6) |
| Gender | |||||||
| Female | 51 (50.0) | 24 (4.7) | 27.4 (27.4, 27.4) | 24.7 (5.1) | 28.3 (28.3, 28.3) | 25.7 (5.6) | 29.8 (29.8, 29.8) |
| Male | 49 (50.0) | 25.4 (3.8) | 28.1 (28.0, 28.1) | 26 (4.1) | 28.7 (28.7, 28.8) | 26.8 (4.6) | 29.9 (29.8, 30.0) |
| Incomea | |||||||
| Lowest | 31.6 (46.5) | 25 (5.1) | 28.8 (28.7, 29.0) | 25.8 (5.5) | 29.5 (29.5, 29.6) | 26.8 (6.1) | 31.2 (31.2, 31.2) |
| Highest | 68.4 (46.5) | 24.5 (4.2) | 27.4 (27.4, 27.5) | 25.1 (4.2) | 28.1 (28.0, 28.1) | 26 (4.6) | 29.3 (29.2, 29.3) |
| Age, mean | 44.4 (17.6) | 43.3 (17.8) | . . . | 43.9 (17.6) | . . . | 45.2 (17.5) | . . . |
| Married, % | 62.4 (48.4) | 63.2 (48.2) | . . . | 62.9 (48.3) | . . . | 61.8 (48.6) | . . . |
| Working, % | 63 (48.3) | 63.2 (48.2) | . . . | 62.6 (48.4) | . . . | 63.2 (48.2) | . . . |
| Smoking, % | 20.3 (40.2) | 24.7 (43.1) | . . . | 21.1 (40.8) | . . . | 17.9 (38.4) | . . . |
Note. CI = confidence interval; BMI = body mass index. Except for the 80th-percentile BMI, all other statistics are weighted and nationally representative.
aDescriptive statistics of the 2 relative income groups were based on a subsample of data with 676 830 observations. See “Independent Variables” subsection of “Methods” section for explanation of how these income groups were derived.