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Table 7 Absolute change in prevalence of overweight (including obesity) and obesity in boys and girls aged 6–9 years from COSI Round 1 (2007/2008) to 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 Overweight (including obesity) (%)# Obesity (%)#
  Boys Girls Boys Girls
6-year-olds     
 BEL - 1.3°°° - 0.2 - 0.2 + 0.1
 SVN - 4.6°° - 1.9 - 1.6 - 1.6
7-year-olds     
 BEL - 0.4 - 0.1 + 0.4 + 0.5
 CZE + 2.9 + 3.5 + 1.0 + 1.5
 IRL - 1.9 - 1.0 - 0.1 - 2.9
 LVA + 0.4 + 3.2° + 2.1° + 2.9°°°
 LTU - 0.4 0 + 0.1 - 0.1
 PRT - 9.0°°°° + 0.7 - 2.5 - 0.4
 SVN - 3.0° - 3.2° - 2.1° - 0.4
8-year-olds     
 BEL - 0.2 - 0.3 - 0.1 + 0.4
 ITA - 4.2°°°° - 2.2° - 3.9°°°° - 1.3
 NOR + 6.2°°° + 3.1 + 4.2°°° + 0.2
 SVN + 0.2 + 0.3 + 1.3 + 1.0
9-year-olds     
 BEL - 0.1 - 0.6 + 0.4 + 0.1
 ITA - 3.3° - 2.7 - 3.8°° - 2.8°°
  1. Abbreviations: BMI/A body mass index-for-age, COSI Childhood Obesity Surveillance Initiative, WHO World Health Organization.
  2. 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; IRL, Ireland; ITA, Italy; LVA, Latvia; LTU, Lithuania; NOR, Norway; PRT, Portugal (all regions except Madeira); SVN, Slovenia.
  3. #Prevalence estimates were based on the 2007 WHO recommended growth reference for school-age children and adolescents [17]. Body weight was adjusted for clothes worn when measured and children with a BMI/A Z-score < −5 or > + 5 were excluded. Overweight and obesity were defined as the proportion of children with a BMI/A value above +1 Z-score and above + 2 Z-scores, respectively.
  4. °Statistically significant difference of proportions between the two rounds for the indicated age-sex group (z test; P < 0.05).
  5. °°Statistically significant difference of proportions between the two rounds for the indicated age-sex group (z test; P < 0.01).
  6. °°°Statistically significant difference of proportions between the two rounds for the indicated age-sex group (z test; P < 0.001).
  7. °°°°Statistically significant difference of proportions between the two rounds for the indicated age-sex group (z test; P ≤ 0.0001).