Table 1.
Characteristics Of The Participating Children
| Variable | All (N = 1051) | Boys (N = 523) | Girls (N = 528) | p-Valuea |
|---|---|---|---|---|
| Age (years) | 9.2 ± 1.7 | 9.3 ± 1.7 | 9.2 ± 1.7 | 0.165 |
| Body weight (kg) | 35.8 ± 18.9 | 38.6 ± 23.2 | 33.2 ± 12.9 | <0.001 |
| Body height (cm) | 133.4 ± 12.1 | 133.6 ± 11.7 | 133.1 ± 12.5 | 0.517 |
| Body mass index (BMI) | 19.4 ± 7.6 | 20.8 ± 9.6 | 18.2 ± 4.4 | <0.001 |
| Average sleep duration (hr/night) | 8.14 ± 1.2 | 8.06 ± 1.2 | 8.22 ± 1.3 | 0.035 |
| Sleep duration in weekdays | 7.85 ± 1.4 | 7.77 ± 1.4 | 7.93 ± 1.5 | 0.074 |
| Sleep duration in weekend days | 8.86 ± 1.4 | 8.76 ± 1.4 | 8.95 ± 1.4 | 0.029 |
| Average breakfast intake (day/week) | 3.51 ± 2.3 | 3.44 ± 2.3 | 3.58 ± 2.3 | 0.350 |
| Average screen time (hr/day) | 3.23 ± 1.7 | 3.46 ± 1.8 | 3.00 ± 1.7 | <0.001 |
Notes: Data are means and standard deviations. aT-test for independent samples (for the differences between boys and girls). Bold values indicate significance.