Table 1.
Study Sample Characteristics: National Longitudinal Study for Adolescent and Adult Health
| Females | Males | |
|---|---|---|
| Count | 7012 | 6401 |
| Age (Wave I) [mean (SE)] | 15.7 (0.1) | 15.8 (0.1) |
| Age (Wave IV) [mean (SE)] | 28.5 (0.1) | 28.7 (0.1) |
| Race/ethnicity (%) | ||
| Non-Hispanic white | 71.6 | 72.6 |
| Non-Hispanic black | 16.9 | 15.2 |
| Hispanic | 11.5 | 12.2 |
| Household income (Wave I; in $10,000) [mean (SE)] | 37.1 (1.03) | 36.9 (1.04) |
| Participant income (Wave IV) (%) | ||
| $0–9999 | 6.3 | 4.6 |
| $10,000–19,999 | 7.9 | 6.4 |
| $20,000–39,999 | 22.3 | 20.9 |
| $40,000+ | 63.6 | 68.1 |
| Parental education (Wave I) (%) | ||
| <High school | 10.8 | 10.7 |
| High school grad/GED | 33.0 | 31.0 |
| Some college/technical school | 26.0 | 27.7 |
| College grad | 30.3 | 30.6 |
| Participant education (Wave IV) (%) | ||
| <High school | 7.7 | 11.1 |
| High school grad/GED | 13.8 | 20.5 |
| Some college/technical school | 44.6 | 41.9 |
| College grad | 34.0 | 26.4 |
| Current smoker (%) | ||
| Wave II | 35.4 | 34.6 |
| Wave III | 34.1 | 37.8 |
| Wave IV | 35.2 | 44.0 |
| Birth weight (kg) [mean (SE)] | 3.28 (0.01) | 3.42 (0.01) |
| BMI [mean (SE)] | ||
| Wave II BMI (kg/m2) | 23.0 (0.1) | 23.0 (0.1) |
| Wave III BMI (kg/m2) | 26.3 (0.2) | 26.2 (0.1) |
| Wave IV BMI (kg/m2) | 29.1(0.2) | 28.8 (0.1) |
| Pre/diabetes (Wave IV) (%) | ||
| Normal | 80.7 | 74.7 |
| Prediabetes | 13.0 | 19.4 |
| Diabetes | 6.3 | 5.9 |
Thirteen thousand four hundred thirteen participants with ≥2 BMI measures; non-Hispanic white, non-Hispanic black, or Hispanic race/ethnicity; 12 years of age or older at Wave I.
GED, general equivalency diploma.