Table 1.

BMI z-score summary and descriptive statistics according to WHO cut-offs.

Sweep	Age 3	Age 5	Age 7	Age 11	Age 14
n	14,176	14,922	13,603	12,864	10,958
Mean (SD)	0.88 (1.04)	0.62 (1.02)	0.48 (1.14)	0.53 (1.23)	0.39 (1.20)
Min	−4.35	−4.60	−4.94	−4.54	−4.51
Max	5.00	4.98	4.96	4.76	4.58
Range	9.35	9.58	9.90	9.30	9.09
Severe thinness	17 (0.1)	16 (0.1)	26 (0.2)	30 (0.2)	37 (0.3)
Thinness	61 (0.4)	55 (0.4)	101 (0.7)	200 (1.6)	208 (1.9)
Normal weight	7,828 (55.2)	10,160 (68.1)	9,655 (71.0)	8,018 (62.3)	7,434 (67.8)
Overweight	4,511 (31.8)	3,437 (23.0)	2,522 (18.5)	2,931 (22.8)	2,180 (19.9)
Obesity	1,759 (12.4)	1,254 (8.4)	1,299 (9.5)	1,685 (13.1)	1,099 (10)

Descriptive statistics are presented in n (%).

% Excluded extreme values (< −5 SD or > +5 SD): at Sweep 2−1%; at Sweep 3−0.4%; at Sweep 4−0.2%; at Sweep 5−0.05%; at Sweep 6−0.01%).

SD, standard deviations.