Table 1.
Characteristics of subjects (n = 2066)
| Characteristics | N | % |
|---|---|---|
| Gender of study child | ||
| Male | 1010 | 48.9 |
| Female | 1056 | 51.1 |
| Age group of study child | ||
| 9-13 years | 1046 | 50.6 |
| 14-16 years | 1020 | 49.4 |
| Maternal age (years ± SD) | 42.7 ± 5.6 | |
| Maternal age at birth of study child (years ± SD) | 29.8 ± 5.3 | |
| Maternal highest primary/secondary education | ||
| < Year 10 | 98 | 4.7 |
| Year 10 and 11 | 782 | 37.9 |
| Year 12 or equivalent | 1186 | 57.4 |
| Maternal birth country | ||
| Australia/New Zealand | 1645 | 79.6 |
| United Kingdom/Ireland | 178 | 8.6 |
| Asia and Indian sub-continent | 87 | 4.2 |
| All other countries | 156 | 7.6 |
| Study child ever been breastfed | 1908 | 92.4 |
| Breastfeeding duration | ||
| 0 months | 173 | 8.4 |
| < 2 months | 263 | 12.7 |
| 2-< 4 months | 204 | 9.9 |
| 4-< 6 months | 307 | 14.9 |
| ≥ 6 months | 1119 | 54.2 |
| Weight statusa of study child | ||
| Underweight | 108 | 5.3 |
| Healthy weight | 1438 | 69.6 |
| Overweight | 387 | 18.7 |
| Obese | 133 | 6.4 |
| Averageb duration of moderate-to-vigorous physical activity | ||
| < 60 minutes/day | 452 | 21.9 |
| ≥ 60 minutes/day | 1614 | 78.1 |
| Averageb screen-time duration of study child | ||
| < 2 hours/day | 350 | 16.9 |
| ≥ 2 hours/day | 1716 | 83.1 |
| Averageb sleep duration of study child | ||
| < 8 hours/day | 90 | 4.4 |
| 8-10 hours/day | 1045 | 50.6 |
| > 10 hours/day | 931 | 45.0 |
| Averagec daily energy intake (mean MJ/d ± SD) | ||
| 9-13 yrs, males (n = 493) | 9.39 ± 2.38 | |
| 9-13 yrs, females (n = 556) | 8.09 ± 2.13 | |
| 14-16 yrs, males (n = 521) | 11.09 ± 3.27 | |
| 14-16 yrs, females (n = 503) | 8.20 ± 2.32 | |
a Age and gender specific BMI equivalent to an adult BMI: underweight (< 18.5 kg/m2); normal weight (18.5-24.9 kg/m2); overweight (25-29.9 kg/m2); obese (≥ 30 kg/m2)
b Average of four days of recording
c Average of two 24 h recalls