Table 1. Descriptive information for the Add Health analytic sample, by race/ethnicity and in the total sample.
| All (N=8594) | European Americans (N=5103) | African Americansc (N=1748) | Hispanic Americans (N=1304)c | Asian Americans (N=439)c | |
|---|---|---|---|---|---|
| Mean (s.d.)/N(%) | Mean (s.d.)/N(%) | Mean (s.d.)/N(%) | Mean (s.d.)/N(%) | Mean (s.d.)/N(%) | |
| Male | 4079 (47.5) | 2414 (47.3) | 786 (45.0) | 644 (49.4) | 235 (53.5) |
| Age in years | 16.4 (1.8) | 16.3 (1.8) | 16.4 (1.9) | 16.6 (1.8) | 16.7 (1.7) |
| BMI (kg m−2)a | 23.4 (5.3) | 23.0 (5.1) | 24.3 (5.8) | 23.9 (5.3) | 22.6 (5.2) |
| Current smoker | 1820 (21.2) | 1389 (27.2) | 162 (9.3) | 208 (16.0) | 61 (13.9) |
| N with self-reported BMI | 81 | 55 | 18 | 7 | 1 |
| % Obeseb | 1032 (12.0) | 547 (10.7) | 276 (15.8) | 171 (13.1) | 38 (8.7) |
| % Overweightb | 1630 (19.0) | 914 (17.9) | 366 (20.9) | 285 (21.9) | 65 (14.8) |
| Region of United States | |||||
| West | 1866 (21.7) | 781 (15.3) | 246 (14.1) | 527 (40.4) | 312 (71.1) |
| Midwest | 2367 (27.5) | 1.869 (36.6) | 335 (19.2) | 97 (7.4) | 6 (15.0) |
| South | 3290 (38.3) | 1685 (33.0) | 1068 (61.1) | 496 (38.0) | 41 (9.3) |
| Northeast | 1071 (12.5) | 768 (15.1) | 99 (5.6) | 184 (14.1) | 20 (4.6) |
| Ancestry (Hispanic and Asian subpopulations) | |||||
| Puerto Rican | — | — | — | 224 | — |
| Cuban | — | — | — | 193 | — |
| Mexican | — | — | — | 663 | — |
| Central/South American | — | — | — | 120 | — |
| Other Hispanic | — | — | — | 104 | — |
| Chinese | — | — | — | — | 122 |
| Filipino | — | — | — | — | 191 |
| Other Asian | — | — | — | — | 135 |
| Immigrant status (Hispanic and Asian subpopulations) | |||||
| US born | — | — | — | 1036 | 281 |
| Non-US born | — | — | — | 268 | 158 |
Abbreviations: BMI, body mass index; SNP, single-nucleotide polymorphism.
a
Calculated as weight in kilograms divided by height in meters squared.
b
Overweight and obesity were defined using age- and sex-specific IOTF centile curves to classify overweight (BMI 25.0–29.9 kg m−2) and obesity (BMI ⩾30 kg m−2) for individuals up to age 18 years,50 and the adult cut points of BMI 25.0–29.9 kg m−2 (overweight) and BMI ⩾30 kg m−2 (obesity) for individuals 18–21 years of age.51
c
Oversampled groups: AfA adolescents with highly educated parents(n=359), Cubans (n=193), Puerto Ricans (n=224), Chinese (n=122).