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Table 1 Weight and weight-for-age Z-scores * of boys and girls aged 6–9 years in COSI Round 2 (2009/2010), by age and country

From: WHO European Childhood Obesity Surveillance Initiative: body mass index and level of overweight among 6–9-year-old children from school year 2007/2008 to school year 2009/2010

Age group and country

Weight#(kg)

W/A Z-score

 

Boys

Girls

Boys

Girls

 

Mean (SD)

6-year-olds

 BEL

23.0 (3.7)§a

22.7 (3.9)a

0.35 (1.06)a

0.33 (1.00)a

 SVN

24.9 (4.6)§b

24.4 (4.6)b

0.70 (1.20)§b

0.62 (1.10)b

 ESP

24.9 (4.6)§b

24.5 (4.6)b

0.81 (1.19)b

0.72 (1.09)c

7-year-olds

 BEL

25.8 (5.0)§a

25.7 (5.4)a

0.40 (1.20)a

0.40 (1.13)a

 CZE

26.0 (4.8)§ab

25.3 (5.1)a

0.63 (1.17)§bc

0.51 (1.12)abc

 GRC

29.5 (5.8)§c

29.1 (6.1)b

1.17 (1.27)§d

1.05 (1.15)d

 HUN

26.7 (5.5)bde

26.4 (5.8)ac

0.57 (1.28)ab

0.54 (1.22)abc

 IRL

26.0 (4.2)§ad

25.6 (4.6)ac

0.53 (1.04)ab

0.51 (1.02)abc

 LVA

27.4 (5.3)§fg

26.5 (5.3)cd

0.63 (1.18)§b

0.45 (1.08)ac

 LTU

27.6 (5.3)§f

27.0 (5.5)d

0.68 (1.17)§bc

0.55 (1.09)bc

 PRT

27.0 (5.5)deg

27.2 (5.7)de

0.61 (1.25)b

0.66 (1.15)be

 SVN

27.8 (5.7)§f

27.1 (5.8)d

0.78 (1.25)§c

0.64 (1.14)b

 ESP

28.5 (5.7)§h

27.9 (5.8)e

0.96 (1.24)§e

0.81 (1.13)e

 MKD

27.6 (6.4)§ef

26.5 (6.4)c

0.70 (1.46)§bc

0.50 (1.32)ac

8-year-olds

 BEL

29.3 (5.5)§a

29.1 (5.9)a

0.45 (1.10)§a

0.40 (1.06)a

 ITA

32.3 (7.3)§b

31.6 (7.3)b

0.90 (1.31)§b

0.70 (1.22)b

 NOR

30.2 (5.7)§c

29.6 (5.6)c

0.69 (1.11)§c

0.56 (1.00)c

 SVN

31.8 (7.0)§d

31.1 (7.1)b

0.90 (1.26)§b

0.72 (1.16)b

 ESP

31.7 (6.4)bd

31.5 (6.7)b

0.91 (1.18)§b

0.79 (1.12)b

9-year-olds

 BEL

32.8 (7.3)a

32.9 (7.6)a

0.46 (1.18)§a

0.36 (1.18)a

 GRC

38.4 (8.9)§b

37.6 (9.1)b

1.30 (1.21)§b

1.02 (1.23)b

 IRL

33.0 (6.3)§ac

32.2 (6.9)a

0.63 (1.05)§c

0.37 (1.13)ac

 ITA

33.9 (7.8)§c

32.9 (7.6)a

0.79 (1.28)§d

0.53 (1.21)c

 LTU

34.7 (7.5)§d

33.7 (7.3)c

0.66 (1.12)§c

0.40 (1.09)a

 SVN

34.2 (7.9)cd

33.8 (8.0)c

0.85 (1.24)§de

0.68 (1.23)d

 ESP

35.9 (7.7)§e

35.2 (7.7)d

0.97 (1.13)§e

0.73 (1.12)d

  1. Abbreviations: ANOVA analysis of variance, COSI Childhood Obesity Surveillance Initiative, SD standard deviation, W/A weight-for-age, WHO World Health Organization.
  2. *Based on the 2007 WHO growth reference for school-age children and adolescents [17].
  3. Body weight was adjusted for clothes worn when measured and children with a W/A Z-score < −6 or > +5 were excluded.
  4. The country codes refer to the International Organization for Standardization (ISO) 3166–1 Alpha-3 country codes and countries were listed in alphabetical order by their full names: BEL, Belgium (Flanders); CZE, Czech Republic; GRC, Greece; HUN, Hungary; IRL, Ireland; ITA, Italy; LVA, Latvia; LTU, Lithuania; NOR, Norway; PRT, Portugal (all regions except Madeira); SVN, Slovenia; ESP, Spain; MKD, the former Yugoslav Republic of Macedonia.
  5. #Non-normally distributed and underwent inverse transformation prior to ANOVA and Games-Howell post hoc tests.
  6. †Statistically significant difference of mean value across countries for the indicated age group (one-way ANOVA; P < 0.0001).
  7. §Statistically significant difference of mean value between boys and girls for the indicated country (one-way ANOVA; P ≤ 0.05).
  8. a,b,c,d,e,f,g,hWithin each sex-age group (e.g. 6-year-old girls), mean values that share the same superscript letter do not statistically significantly differ from each other (Games-Howell post hoc test). For example, for the 6-year-old girls, each mean W/A Z-score value is significantly different from the other two whereas the value of Belgian 6-year-old boys differed significantly from the other two and no significant difference was found between Slovenian and Spanish 6-year-old boys.