Table 1 Basic characteristics of the reference population for boys and girls
Girls | Boys | |
---|---|---|
N (%) | N (%) | |
Sex | 4854 (49.3) | 5001 (50.7) |
Mean (s.d.) | Mean (s.d.) | |
Age, years | 6.53 (1.91) | 6.45 (1.91) |
Weight, kg | 23.40 (6.52) | 23.76 (6.67) |
Height, cm | 119.8 (13.2) | 120.5 (13.2) |
BMI, kg m−2 | 16.00 (1.84) | 16.05 (1.78) |
BMI, z-score | 0.15 (0.99) | 0.11 (1.00) |
N (%) | N (%) | |
Age categories | ||
2–2.9-year olds | 99 (2.0) | 101 (2.0) |
3–3.9-year olds | 478 (9.9) | 531 (10.6) |
4–4.9-year olds | 639 (13.2) | 689 (13.8) |
5–5.9-year olds | 592 (12.2) | 645 (12.9) |
6–6.9-year olds | 757 (15.6) | 766 (15.3) |
7–7.9-year olds | 1067 (22.0) | 1055 (21.1) |
8–8.9-year olds | 796 (16.4) | 794 (15.9) |
9–9.9-year olds | 288 (5.9) | 297 (5.9) |
10–10.9-year olds | 138 (2.8) | 123 (2.5) |
BMI categories | ||
Thinness grade I–III | 592 (12.2) | 617 (12.3) |
Normal weight | 3557 (73.3) | 3766 (75.3) |
Overweight | 705 (14.5) | 618 (12.4) |
Survey | ||
T0 | 4351 (89.6) | 4546 (90.9) |
T1 | 503 (10.4) | 455 (9.1) |