Table 1.
Characteristics of participants.
| Variables | All (n = 10,002) | Boys (n = 5,047) | Girls (n = 4,955) | p-value |
|---|---|---|---|---|
| Age (years)* | 14.39 (1.79) | 14.32 (1.78) | 14.45 (1.80) | 0.00 |
| BMI* | 20.36 (4.06) | 20.50 (3.87) | 20.21 (4.25) | 0.00 |
| Overweightness/obesity (%) | 18.82 | 19.24 | 18.39 | 0.00 |
| 50-m sprint (sec)* | 8.84 (1.58) | 8.26 (1.63) | 9.43 (1.28) | 0.00 |
| Standing long jump (cm)* | 184.09 (33.59) | 202.67 (32.49) | 165.17 (22.20) | 0.00 |
| Sit and reach (cm)* | 11.16 (8.62) | 9.68 (9.23) | 12.68 (7.66) | 0.00 |
| 1,000-m run (min) | 4.52 (0.97) | |||
| 800-m run (min) | 4.06 (0.68) | |||
| Pull-ups (reps) | 5.35 (6.40) | |||
| Bent-leg sit-ups (reps) | 30.35 (10.45) | |||
| Screen-based sedentary behavior | ||||
| Television viewing, n (%)* | 0.00 | |||
| <3 h | 9,048 (90.46) | 4,507 (89.30) | 4,541 (91.64) | |
| ≥3 h | 954 (9.54) | 540 (10.70) | 414 (8.36) | |
| Computer/videogame use, n (%)* | 0.00 | |||
| <3 h | 8,826 (88.24) | 4,286 (84.92) | 4,540 (91.62) | |
| ≥3 h | 1,176 (11.76) | 761 (15.8) | 415 (8.38) | |
| Physical activity category, n (%)* | 0.00 | |||
| Active | 5,964 (59.63) | 3,212 (63.64) | 2,752 (55.54) | |
| Inactive | 4,038 (40.37) | 1,835 (36.36) | 2,203 (44.46) | |
| Regular exercise, n (%)* | 0.00 | |||
| <1 time pw | 1,961 (19.61) | 923 (18.29) | 1,038 (20.95) | |
| 1–2 times pw | 4,104 (41.03) | 1,912 (37.88) | 2,192 (44.24) | |
| 3–4 times pw | 2,282 (22.82) | 1,219 (24.15) | 1,063 (21.45) | |
| ≥5 times pw | 1,655 (16.55) | 993(19.68) | 662 (13.36) | |
| SES, n (%) | 0.32 | |||
| High | 2,696 (26.96) | 1,392 (27.58) | 1,304 (26.32) | |
| Moderate | 3,057 (30.56) | 1,540 (30.51) | 1,517 (30.62) | |
| Low | 4,249 (42.48) | 2,115 (41.91) | 2,134 (42.06) |
Data were described as n (%) or mean ± SD; BMI, Body Mass Index; SES, socioeconomic status; Screen-based SB, Screen-based sedentary behavior; TV, Television viewing; C/V use, Computer/videogame use; pw: per week. *Significant difference between male and female, p < 0.05.