Table 1. Population characteristics by two stage samples.
| Variable | Stage 1 Samples (n = 10818) | Stage 2 Samples (n = 4615) |
| Continuous (Mean (SD)) | ||
| Age (years) | 48.0 (18.7) | 50.3 (19.5) |
| BMI (kg/m2) | 28.4 (6.4) | 28.4 (6.3) |
| Total cholesterol (mg/dL) | 201.8 (43.9) | 202.0 (44.0) |
| HDL (mg/dL) | 53.0 (16.3) | 54.7 (16.3) |
| LDL (mg/dL) | 118.9 (37.8) | 119.9 (38.1) |
| Triglycerides (mg/dL) | 150.2 (135) | 140.0 (139) |
| Categorical (N (%)) | ||
| Gender | ||
| Male | 5029 (46.5) | 2220 (48.1) |
| Female | 5789 (53.5) | 2395 (51.9) |
| Race/Ethnicity | ||
| Non-Hispanic White | 5397 (49.9) | 2447 (53.0) |
| Mexican American | 2433 (22.5) | 925 (20.0) |
| Non-Hispanic Black | 2121 (19.6) | 905 (19.6) |
| Other Hispanic | 498 (4.6) | 139 (3.0) |
| Others | 369 (3.4) | 199 (4.3) |
| Education | ||
| < High School | 3383 (31.3) | 1356 (29.4) |
| High School | 2522 (23.3) | 1159 (25.1) |
| College or Above | 4913 (45.4) | 2100 (45.5) |
| Study Year | ||
| 1999–2000 | 3089 (28.5) | - |
| 2001–2002 | 4736 (43.8) | - |
| 2003–2004 | - | 4615 (100) |
| 2005–2006 | 2993 (27.7) | - |
HDL, high-density lipoprotein cholesterol; LDL, low-density lipoprotein cholesterol.