Table 1 Characteristics of participants by sex, Bt20+
Males | Females | |
|---|---|---|
N | 638 | 699 |
Childhood characteristics | ||
Birth order, % | ||
First born | 38 | 41 |
BMIZ at age 7/8 or 9 ya | 0.0 (0.9) | 0.0 (1.0) |
Maternal characteristics | ||
Schooling at child age 7/8 y, % | ||
Matriculated | 29 | 31 |
Household characteristics | ||
SES asset quintile at child age 7/8 y, % | ||
1 (lowest) | 16 | 22 |
2 | 21 | 17 |
3 | 30 | 29 |
4 | 23 | 19 |
5 (highest) | 10 | 13 |
Adolescent trajectories | ||
informal activity, % | ||
Decreasing over time | 93 | 95 |
Increasing over time | 7 | 5 |
Organized sports participation, % | ||
Males | ||
Consistently low | 82 | |
Decreasing from adequate to low | 11 | |
Increasing from low to adequate | 7 | |
Females | ||
No sports participation | 89 | |
Some sports participation | 11 | |
Walking to and from school, % | ||
Consistently 150 min/week | 83 | 75 |
Consistently 300 min/week | 17 | 25 |
Overall physical activity, % | ||
Decreasing activity over time and do not walk to school | 22 | 31 |
Decreasing activity over time but consistently walk to school | 50 | 54 |
Consistently more active and consistently walk to school | 28 | 15 |
Sedentary behavior, % | ||
Males | ||
Consistently low | 78 | |
Consistently high | 12 | |
Increasing from low to high | 10 | |
Females | ||
Initially low but increasing | 92 | |
Consistently high | 8 | |
Schoolnight sleep, % | ||
≤ 8 h/night | 35 | 65 |
≥ 9 h/night | 65 | 35 |
Young-adult characteristics (18 y) | ||
Heighta, cm | 170.7 (6.5) | 159.6 (6.1) |
BMIa, kg/m2 | 20.3 (3.2) | 23.2 (4.6) |
Waist-circumferencea, cm | 72.0 (7.2) | 75.6 (12.9) |
Fat mass indexa,b, kg/m2 | 2.5 (1.5) | 7.3 (3.0) |
Lean mass indexa,b, kg/m2 | 15.0 (1.5) | 13.1 (1.6) |
Body fata,b, % | 13.2 (5.5) | 33.6 (6.7) |