Variables | Boys, Mean (±SD) (n = 38,152) |
Girls, Mean (±SD) (n = 34,247) |
Total, Mean (±SD) (n = 72,399) |
---|---|---|---|
Age (years) | 015.00 ± 1.73 | 015.12 ± 1.77 | 015.06 ± 1.75 |
Height (m) | 1.70 ± .08 | 1.60 ± .05 | 1.65 ± .08 |
Weight (kg) | 060.14 ± 11.72 | 051.47 ± 7.67 | 056.04 ± 10.91 |
BMI (kg·m-2) | 020.80 ± 3.21 | 020.05 ± 2.58 | 020.45 ± 2.95 |
Weight state | Boys, N (%) | Girls, N (%) | Total, N (%) |
Underweight (BMI < 18.5) | 09719 (25.5) | 10012 (29.2) | 19731 (27.3) |
Normal weight (18.5 ≤ BMI < 23) | 19685 (51.6) | 19655 (57.4) | 39340 (54.3) |
Overweight (23 ≤ BMI < 25) | 04382 (11.5) | 02967 (8.7) | 07349 (10.2) |
Obesity (25 ≤ BMI) | 04366 (11.4) | 01613 (4.7) | 05979 (08.3) |
Family economic state | Boys, N (%) | Girls N (%) | Total, N (%) |
High | 02691 (07.1) | 01337, (03.9) | 04028 (05.6) |
Middle high | 08768 (23.0) | 06719 (19.6) | 15487 (21.4) |
Average | 17229 (45.2) | 17259 (50.4) | 34488 (47.6) |
Middle low | 06890 (18.1) | 06825 (19.9) | 13715 (18.9) |
Low | 02574 (06.7) | 02107 (06.2) | 04681 (06.5) |
City size | Boys, N (%) | Girls, N (%) | Total, N (%) |
Large | 20252 (53.1) | 17708 (51.7) | 37960 (52.4) |
Middle | 13303 (34.9) | 12153 (35.5) | 25456 (35.2) |
Small | 04597 (12.0) | 04386 (12.8) | 08983 (12.4) |
Grade | Boys, N (%) | Girls, N (%) | Total, N (%) |
Middle 1st | 06711 (17.6) | 05615 (16.4) | 12326 (17.0) |
Middle 2nd | 06722 (17.6) | 05727 (16.7) | 12449 (17.2) |
Middle 3rd | 06767 (17.7) | 05615 (16.4) | 12382 (17.1) |
High 1st | 06626 (17.4) | 05369 (15.7) | 11995 (16.6) |
High 2nd | 05889 (15.4) | 06102 (17.8) | 11991 (16.6) |
High 3rd | 05437 (14.3) | 05819 (17.0) | 11256 (15.5) |
PE class frequency | Boys, N (%) | Girls, N (%) | Total, N (%) |
No class per week | 02961 (7.8) | 03815 (11.1) | 06776 (9.4) |
1 PE class per week | 03064 (8.0) | 03236 (9.4) | 06300 (8.7) |
2 PE classes per week | 18479 (48.4) | 15738 (46.0) | 34217 (47.2) |
≥ 3 PE classes per week | 13648 (35.8) | 11458 (33.5) | 25106 (34.7) |