Research Article

WHO European Childhood Obesity Surveillance Initiative: Impact of Type of Clothing Worn during Anthropometric Measurements and Timing of the Survey on Weight and Body Mass Index Outcome Measures in 6–9-Year-Old Children

Table 3

Unadjusted and clothes-adjusted mean values of weight-for-age -score and BMI-for-age -score of children aged 6–9 years and relative difference between the unadjusted and clothes-adjusted values, by COSI round and country.

Round and countryMean   -score Relative difference between unadjusted and
clothes-adjusted mean
-score (%)
Mean BMI/-score Relative difference between unadjusted and
clothes-adjusted mean BMI/
-score (%)
UnadjustedClothes-adjusted
country-specific
Clothes-adjusted
non-country-specific
Country-specificNon-country-specificUnadjustedClothes-adjusted
country-specific
Clothes-adjusted non-country-specificCountry-specificNon-country-specific

Round 1
 Belgium0.43NA0.40NA−7.00.28NA0.24NA−14.3
 Bulgaria0.470.410.43−12.8−8.50.440.350.38−20.5−13.6
 Czech Republic0.51NA0.51NA00.17NA0.17NA0
 Ireland0.61NA0.56NA−8.20.62NA0.55NA−11.3
 Italy0.920.820.83−10.9−9.81.010.880.89−12.9−11.9
 Latvia0.620.540.56−12.9−9.70.380.260.30−31.6−21.1
 Lithuania0.720.630.66−12.5−8.30.420.280.33−33.3−21.4
 Malta0.550.480.49−12.7−10.90.740.640.66−13.5−10.8
 Norway0.600.540.52−10.0−13.30.370.290.26−21.6−29.7
 Portugal0.680.680.670−1.50.720.720.710−1.4
 Slovenia0.82NA0.79NA−3.70.49NA0.45NA−8.2
 Sweden0.590.590.560−5.10.310.310.270−12.9
Round 2
 Belgium0.43NA0.39NA−9.30.27NA0.22NA−18.5
 Czech Republic0.58NA0.57NA−1.70.28NA0.28NA0
 Greece1.18NA1.15NA−2.51.09NA1.05NA−3.7
 Hungary0.61NA0.57NA−6.60.39NA0.33NA−15.4
 Ireland0.56NA0.51NA−8.90.55NA0.49NA−10.9
 Italy0.850.760.76−10.6−10.60.900.770.78−14.4−13.3
 Latvia0.600.540.56−10.0−6.70.360.270.30−25.0−16.7
 Lithuania0.630.580.60−7.9−4.80.310.240.27−22.6−12.9
 Norway0.680.630.61−7.4−10.30.480.410.38−14.6−20.8
 Portugal0.680.660.67−2.9−1.50.660.620.63−6.1−4.5
 Slovenia0.820.750.79−8.5−3.70.500.400.46−20.0−8.0
 Spain0.89NA0.85NA−4.50.89NA0.83NA−6.7
 The former Yugoslav
 Republic of Macedonia
0.770.640.72−16.9−6.50.770.580.69−24.7−10.4

BMI: body mass index; BMI/: BMI-for-age; COSI: Childhood Obesity Surveillance Initiative; NA: not applicable because the country did not use its own clothes adjustment weights; : weight-for-age.
Only children whose age fell within the country-specific targeted age group(s) were included (see Table 1).
Body weight was adjusted for the clothes worn when measured using country-specific adjustment weights for all four predefined types of clothing and the clothing answer option “other.”
Body weight was adjusted for the clothes worn when measured using the average non-country-specific adjustment weights for the four predefined types of clothing “underwear only,” “gym clothes,” “light clothing,” and “heavy clothing,” and country-specific adjustment weights for the clothing answer option “other.”