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n a
Age (yrs.)
Height (cm)
Weight (kg)
BMI (kg.m−2
WC (cm)
Socioeconomic status b
Low (%)
Medium (%)
High (%)
Missing (%)
BOYS
6-y-olds
2011
494 (475)
6.6 (0.4)
122.2 (5.8)
24.0 (3.7)
16.0 (1.6)
54.8 (4.2)
4.5%
33.2%
61.1%
1.2%
2018
411 (403)
6.5 (0.4)
121.5 (5.5)
23.4 (3.6)
15.8 (1.6)*
54.6 (4.0)
2.9%
20.9%
60.1%
16.1%
9-y-olds
2005
599 (593)
9.6 (0.4)
139.9 (6.2)
33.9 (6.3)
17.2 (2.4)
62.1 (7.2)
9.7%
34.1%
44.1%
12.2%
2011
652 (630)
9.6 (0.4)
138.7 (6.8)
34.0 (7.0)
17.6 (2.8)
60.8 (6.7)*
5.8%
39.1%
53.4%
1.7%
2018
607 (597)
9.5 (0.4)
139.2 (6.3)
33.9 (6.5)
17.4 (2.5)
60.9 (6.2)
1.2%
17.0%
61.8%
20.1%
15-y-olds
2005
340 (334)
15.6 (0.4)
175.6 (7.1)
65.2 (12.8)
21.1 (3.7)
75.5 (9.4)
5.6%
32.9%
34.7%
26.8%
2011
480 (430)
15.2 (0.6)*
173.2 (8.0)*
62.3 (12.0)*
20.7 (3.3)
73.1 (8.7)*
7.3%
38.1%
50.4%
4.2%
2018
491 (444)
15.4 (0.4)**
175.1 (7.4)**
63.5 (11.3)
20.6 (3.0)
72.7 (6.9)*
2.9%
15.1%
56.4%
25.7%
GIRLS
6-y-olds
2011
510 (493)
6.6 (0.4)
120.9 (5.4)
23.8 (4.2)
16.2 (2.0)
54.4 (5.0)
5.3%
32.2%
60.6%
2.0%
2018
427 (412)
6.5 (0.4)
120.7 (5.3)
23.3 (3.6)
15.9 (1.7)**
53.8 (4.3)
2.3%
15.9%
64.4%
17.3%
9-y-olds
2005
524 (518)
9.6 (0.4)
138.4 (6.8)
34.0 (7.1)
17.6 (2.7)
63.3 (7.7)
6.7%
38.4%
45.0%
9.9%
2011
692 (679)
9.6 (0.4)
138.0 (6.5)
33.7 (6.8)
17.6 (2.7)
59.4 (6.5)*
7.4%
35.3%
54.9%
2.5%
2018
613 (594)
9.5 (0.4)
138.3 (6.5)
33.8 (7.0)
17.5 (2.6)
59.6 (6.6)*
2.6%
20.7%
57.1%
19.6%.
15-y-olds
2005
360 (356)
15.6 (0.4)
165.6 (6.5)
58.0 (8.7)
21.1 (2.8)
73.3 (6.9)
8.3%
36.9%
34.7%
20.0%
2011
489 (422)
15.2 (0.6)*
165.0 (6.2)
57.4 (9.5)
21.1 (3.1)
69.2 (6.7)*
6.1%
38.2%
53.0%
2.7%
2018
497 (457)
15.4 (0.4)**
165.4 (6.1)
58.3 (9.9)
21.3 (3.3)
68.8 (6.9)*
3.6%
13.3%
58.8%
24.4%
Abbreviations: yrs. years, BMI body mass index, WC waist circumference* Significantly different from 2005 (from 2011 in 6-y-olds) (p ≤ 0.049)
** Significantly different from 2005 & 2011 (p < 0.01)
a n varies for the different anthropometric measurements and is lowest (in parenthesis) for WC except in 15-y-old boys (weight) and 15-y-old girls (BMI)b Based on parental education level (the parent with the highest attained education level), with low = primary school or lower secondary school, middle = high school (vocational or general studies), and high = University College or University degree. Note that parental education levels are based on self-reports in 2005 and 2018, and from linkage with registry data (Statistics Norway) in 2011
