Table 1 Characteristics of the sample, stratified by age groups (n = 7555)a
Characteristic | n | Children (Grades K, 2, 4) | n | Adolescents (Grades 6, 8, 10) | P-value |
|---|---|---|---|---|---|
 Age (years, mean, SE) | 3884 | 7.27 (0.03) | 3671 | 13.44 (0.04) |  |
 Boys (%, SE) | 1826 | 49.0 (1.3) | 1837 | 50.4 (3.0) | 0.657 |
Weight status indicators (%, SE) | |||||
 Overweight/obeseb | 828 | 21.9 (1.6) | 995 | 27.0 (1.3) | 0.003 |
 WHtR ≥ 0.5 | 542 | 14.5 (1.4) | 471 | 13.2 (1.2) | 0.424 |
Socio-economic tertile (%, SE) | |||||
 Low | 808 | 21.8 (5.8) | 1039 | 31.3 (4.4) | 0.211 |
 Middle | 1303 | 33.6 (6.7) | 1298 | 33.2 (4.1) | |
 High | 1773 | 44.6 (7.3) | 1334 | 35.4 (4.7) | |
Cultural background (%, SE) | |||||
 English-speaking | 3320 | 87.2 (2.5) | 3181 | 87.5 (2.0) | 0.910 |
 Non-English speaking | 489 | 12.8 (2.5) | 450 | 12.5 (2.0) | |
Residential location (%, SE) | |||||
 Urban | 2991 | 78.6 (6.6) | 2781 | 73.9 (5.0) | 0.475 |
 Rural | 893 | 21.4 (6.6) | 890 | 26.1 (5.0) | |