Table 1. NHANES participants characteristics from 1999 to 2012.
| All (N = 36,673) | 1999–2010 (N = 5,094) | 2001–2002 (N = 4,808) | 2003–2004 (N = 4,673) | 2005–2006 (N = 5,878) | 2007–2008 (N = 6,150) | 2009–2010 (N = 5,503) | 2011–2012 (N = 4,597) | ||
|---|---|---|---|---|---|---|---|---|---|
| Gender N (%) | Male | 18,266 (49.8%) | 2,536 (49.8%) | 2,418 (50.3%) | 2,387 (51.4%) | 2,910 (49.5%) | 3,006 (48.9%) | 2,740 (49.8%) | 2,269 (49.4%) |
| Female | 18,407 (50.2%) | 2,558 (50.2%) | 2,390 (49.7%) | 2,256 (48.6%) | 2,968 (50.5%) | 3,144 (51.1%) | 2,763 (50.2%) | 2,328 (50.6%) | |
| Age (years) | Mean (SD) | 50.7 (18.6) | 51.4 (19.2) | 51.9 (19.5) | 49.9 (18.9) | 51.0 (17.9) | 49.9 (17.9) | 49.1 (17.9) | 51.9 (18.9) |
| Race/Ethnicity N (%) | Mexican American | 6,723 (18.3%) | 1,038 (20.4%) | 923 (19.2%) | 897 (19.3%) | 1,011 (17.2%) | 1,120 (18.2%) | 534 (9.7%) | 1,200 (26.1%) |
| Other Hispanic | 2,651 (7.2%) | 220 (4.3%) | 147 (3.1%) | 140 (3%) | 657 (11.2%) | 628 (10.2%) | 573 (10.4%) | 286 (6.2%) | |
| Non-Hispanic White | 1,7430 (47.5%) | 2,699 (53%) | 2,573 (53.5%) | 2,345 (50.5%) | 2,752 (46.8%) | 2,953 (48%) | 2,023 (36.8%) | 2,085 (45.4%) | |
| Non-Hispanic Black | 7,644 (20.8%) | 972 (19.1%) | 956 (19.9%) | 1,077 (23.2%) | 1,214 (20.7%) | 1109 (18%) | 1,437 (26.1%) | 879 (19.1%) | |
| Other | 2225 (6.1%) | 165 (3.2%) | 209 (4.3%) | 184 (4%) | 244 (4.2%) | 340 (5.5%) | 936 (17%) | 147 (3.2%) | |
| Education N (%) | <high school | 11,065 (30.2%) | 1,589 (31.3%) | 1,430 (29.8%) | 1,295 (27.9%) | 1,845 (31.4%) | 1,755 (28.6%) | 1,325 (24.1%) | 1,826 (39.9%) |
| High school | 8,577 (23.4%) | 1197 (23.6%) | 1,222 (25.5%) | 1112 (24%) | 1,444 (24.6%) | 1,413 (23%) | 1,161 (21.1%) | 1,028 (22.5%) | |
| >high school | 16,938 (46.3%) | 2,287 (45.1%) | 2,143 (44.7%) | 2,227 (48.1%) | 2,582 (44%) | 2,967 (48.4%) | 3,012 (54.8%) | 1,720 (37.6%) | |
| Marital status N (%) | Married/Living with partners | 21,339 (59%) | 3,092 (60.8%) | 2,806 (58.4%) | 2,812 (60.7%) | 3,476 (59.2%) | 3,622 (58.9%) | 3,082 (56.1%) | 2,449 (59.8%) |
| Other | 14,801 (41%) | 1,994 (39.2%) | 1,999 (41.6%) | 1,824 (39.3%) | 2,398 (40.8%) | 2,525 (41.1%) | 2,414 (43.9%) | 1,647 (40.2%) | |
| Income to poverty ratio1 | ≤1.3 | 10,266 (30.8%) | 1,279 (27.4%) | 1,279 (28.4%) | 1,135 (25.8%) | 1,641 (30.8%) | 1,872 (33.8%) | 1,843 (36.8%) | 1,217 (31.3%) |
| 1.3–3.5 | 12,689 (38.1%) | 1,796 (38.4%) | 1,831 (40.7%) | 1,761 (40%) | 2,076 (39%) | 2,080 (37.6%) | 1,670 (33.3%) | 1,475 (37.9%) | |
| >3.5 | 10,385 (31.1%) | 1,598 (34.2%) | 1,391 (30.9%) | 1,511 (34.3%) | 1,605 (30.2%) | 1,585 (28.6%) | 1,498 (29.9%) | 1,197 (30.8%) | |
| Systolic BP (mmHg) | Mean (SD) | 125.2 (20.0) | 126.4 (21.1) | 126.4 (21.4) | 125.2 (19.8) | 124.8 (19.0) | 123.0 (18.6) | 123.7 (18.5) | 128.2 (21.5) |
| Diastolic BP (mmHg) | Mean (SD) | 70.4 (13.5) | 71.5 (13.8) | 69.8 (13.8) | 69.7 (13.6) | 70.1 (13.1) | 69.3 (13.1) | 71.0 (12.6) | 71.8 (14.4) |
| BMI (Kg/m2) | Mean (SD) | 28.7 (6.6) | 28.2 (6.2) | 28.4 (6.3) | 28.8 (6.7) | 29.0 (6.7) | 29.1 (6.8) | 28.8 (6.9) | 28.4 (6.2) |
| Obesity N (%) | BMI ≥30 | 11,789 (34.7%) | 1,340 (30.4%) | 1,451 (32.7%) | 1,532 (35.2%) | 2,028 (36.5%) | 2,255 (38.1%) | 1,855 (35.8%) | 1,328 (32.3%) |
| HbA1c | Mean (SD) | 5.7 (1.1) | 5.6 (1.1) | 5.6 (1.0) | 5.6 (1.0) | 5.8 (1.1) | 5.8 (1.0) | 5.8 (1.1) | 5.6 (1.2) |
| Total cholesterol mg/dL | Mean (SD) | 198.2 (42.2) | 202.5 (43.1) | 201.3 (43.8) | 196.7 (42.0) | 196.9 (42.0) | 195.4 (41.3) | 192.9 (41.5) | 203.9 (40.7) |
Data are presented as Number (%) for categorical variables and mean (SD) for continuous variables. 1Income-to-poverty ratio was categorized according to the Supplemental Nutrition Assistance Program (SNAP) criteria.