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Table 4 Prevalence of overweight (including obesity) and obesity in 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 Prevalence of overweight (including obesity) Prevalence of obesity
  WHO definition# IOTF definition* WHO definition# IOTF definition*
  Boys Girls Boys Girls Boys Girls Boys Girls
  %
6-year-olds°
 BEL 18.0a 18.2a 10.8a 15.1a 5.8a 5.2a 2.8a 4.2a
 SVN 23.5b 21.7b 16.5b 18.3b 10.0b 6.8b 5.2b 5.8b
 ESP 38.2c 34.5c 25.6c 30.0c 15.1c 12.8c 8.7c 9.9c
7-year-olds°°
 BEL 23.1a 24.1a 15.4a 20.3a 9.5a 8.5ab 5.1a 6.8ab
 CZE 24.4ab 23.7a 17.5ab 19.3a 10.7ab 7.3ab 5.0a 5.9ab
 GRC 48.9c 44.8b 38.1c 39.9b 23.9c 18.6c 13.6b 14.3c
 HUN 25.1ad 28.2ac 18.9abd 23.9ac 14.2abde 10.3abd 6.7ac 8.2abc
 IRL 25.7ad 30.0acd 15.7ab 24.9ac 8.6ab 6.9ab 4.1a 4.7a
 LVA 24.5ae 22.2a 15.9ab 17.8a 10.8ab 7.5ab 5.2a 5.3a
 LTU 24.4ae 21.0a 16.0ab 17.7a 9.5ab 7.1a 5.0a 5.6a
 PRT 31.5bde 36.2bcd 22.7bd 30.5cd 14.2abcde 12.2abcd 7.9ac 9.6abc
 SVN 29.6bde 24.8a 21.1bd 21.2a 13.5be 9.4ab 7.1ac 6.7ab
 ESP 44.6c 40.4bd 33.5ce 36.6bd 21.0cd 14.7cd 11.5bc 10.5bc
 MKD 34.0d 27.4a 26.2de 22.9ac 18.2de 12.1bd 10.9c 9.6abc
8-year-olds°°
 BEL 21.9a 22.4a 14.2a 17.8a 7.9a 6.7a 3.6a 4.6a
 ITA 44.8b 40.4b 33.9b 34.4b 22.8b 16.0b 11.6b 11.3b
 NOR 29.2c 26.2a 18.6c 21.5c 11.6c 6.2a 4.9a 3.5a
 SVN 36.1d 32.0c 26.5d 26.6d 17.6d 11.9bc 8.5c 8.5c
 ESP 45.3b 41.0b 33.0b 34.4b 20.0bd 14.7c 8.3c 9.2bc
9-year-olds°°°
 BEL 27.3a 26.6a 18.7a 21.8a 11.2a 9.0a 5.1a 5.9a
 GRC 57.2b 50.0b 45.1b 42.3b 30.5b 20.8b 14.7b 14.6b
 IRL 32.2ac 30.3ac 19.7ac 23.1acd 10.3a 6.8ac 4.5ac 4.8ac
 ITA 43.8d 37.4cd 32.9d 31.4e 21.9c 13.0d 10.1d 8.4d
 LTU 27.3a 21.3e 17.8a 16.9c 11.3a 5.9c 4.7a 4.1a
 SVN 36.8c 33.6cd 25.7c 29.1de 17.0d 13.6d 8.0acd 9.8bcd
 ESP 48.9d 42.2bd 34.1d 35.4be 22.3cd 14.6d 9.5cd 10.0bd
  1. Abbreviations: BMI body mass index, BMI/A BMI-for-age, COSI Childhood Obesity Surveillance Initiative, IOTF International Obesity Task Force, 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; 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.
  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. *Prevalence estimates were based on the IOTF recommended growth reference for school-age children and adolescents [19]. Body weight was adjusted for clothes worn when measured and children with a BMI/A Z-score < −5 or > +5 were excluded (based on the 2007 WHO growth reference [17]). Overweight and obesity were defined by using cut-off points for BMI, passing through 25 kg/m2 and 30 kg/m2 by the age of 18 years, respectively.
  5. †Statistically significant difference of proportions across countries for the indicated age group (Chi-squared test; P < 0.001).
  6. °Statistically significant difference of proportions between boys and girls for overweight (based on IOTF definition only) and for obesity (based on WHO and IOTF definitions) (Chi-squared test; P < 0.001).
  7. °°Statistically significant difference of proportions between boys and girls for overweight and obesity (based on WHO and IOTF definitions) (Chi-squared test; P < 0.05).
  8. °°°Statistically significant difference of proportions between boys and girls for overweight (based on WHO and IOTF definitions) and for obesity (based on WHO definitions only) (Chi-squared test; P < 0.05).
  9. a,b,c,d,eWithin each sex-age group (e.g. 6-year-old boys), proportions that share the same superscript letter do not statistically significantly differ from each other (Marascuilo procedure). For example, for the 6-year-old boys and girls, each overweight or obesity prevalence estimate is significantly different from the other two.