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 2

Adjustment weights (grams) for different types of clothing as applied by the countries and weighted mean clothes adjustment (grams) for the entire country dataset by COSI round and country.

Round and country	Clothes adjustment weights (grams)					Weighted mean clothes adjustment (grams)
	Underwear only	Gym clothes	Light clothing	Heavy clothing	Other	Country-specific	Non-country-specific	Absolute change country-specific non-country-specific
Round 1
Belgium^#	0	130	195	600	ND	NA	130	NA
Bulgaria	85	220	270	590	ND	240	163	−77
Czech Republic^#	0	130	195	600	ND	NA	1	NA
Ireland^#	0	130	195	600	ND	NA	205	NA
Italy	0–92	137–250	260–450	455–734	ND	478	441	−37
Latvia	0	165	300	800	ND	317	224	−93
Lithuania	0	265	380	625	ND	386	256	−130
Malta	ND	ND	230	ND	ND	230	195	−35
Norway	0	ND	100	500	0–500	275	364	+89
Portugal	0	0	0	600	0	8	30	+22
Slovenia^#	0	130	195	600	ND	NA	130	NA
Sweden	0	0	100	500	0–500	17	135	+118
Interquartile range	0	220	200	125	ND	228	110	141
Mean (SD)	14 (35)	130 (124)	197 (134)	603 (110)	ND	244 (164)	190 (125)	−18 (88)
Round 2
Belgium^#	0	130	195	600	ND	NA	130	NA
Czech Republic^#	0	130	195	600	ND	NA	5	NA
Greece^#	0	130	195	600	ND	NA	171	NA
Hungary^#	0	130	195	600	ND	NA	146	NA
Ireland^#	0	130	195	600	ND	NA	213	NA
Italy	28–92	108–250	252–449	455–826	ND	470	432	−38
Latvia	0	165	300	800	130–800	254	177	−77
Lithuania	0	265	380	625	ND	241	131	−110
Norway	0	ND	100	500	0–500	236	328	+92
Portugal	0	100	400	600	0–400	112	68	−44
Slovenia	ND	300	ND	ND	ND	300	130	−170
Spain^#	0	130	195	600	ND	NA	195	NA
The former Yugoslav; Republic of Macedonia	ND	ND	500	ND	ND	500	195	−305
Interquartile range	0	150	100	163	ND	234	65	132
Mean (SD)	0 (0)	208 (92)	336 (150)	631 (125)	ND	302 (138)	179 (108)	−93 (123)

COSI: Childhood Obesity Surveillance Initiative; NA: not applicable because the country did not use its own clothes adjustment weights; ND: not determined, because none of the children were classified into this category; SD: standard deviation.
The weighted mean of the clothes adjustment weights for the entire country dataset was calculated by firstly multiplying the clothes adjustment weight used for each type of clothing by a country and the proportion that each type of clothing occurred in a dataset and secondly by adding up the weighted mean for each type of clothing.
This answer option was selected when an examiner found it difficult to choose one of the four other predefined answer options for the clothes worn by a child.
The country-specific clothes adjustment weights that were provided for all predefined types of clothing were applied to calculate the weighted mean of the clothes adjustment weights for the entire country dataset.
The average non-country-specific clothes adjustment weights were applied for the four predefined answer options (“underwear only”: 0 grams, “gym clothes”: 130 grams, “light clothing”: 195 grams, and “heavy clothing”: 600 grams) and country-specific clothes adjustment weights for the option “other” (if applicable) to calculate the weighted mean of the clothes adjustment weights for the entire country dataset.
^#This country did not provide its own country-specific clothes adjustment weights; thus, the average non-country-specific adjustment weights were applied, based on the single country-specific adjustment weights provided by Bulgaria, Latvia, Lithuania, Malta, Norway, Portugal, and Sweden for each predefined type of clothing in round 1.
Various adjustment weights, based on a description of the clothes worn, were used; hence, a range is indicated.
All single country-specific clothes adjustment weights for a type of clothing (except those from Italy) were included in the calculation of these values.
The interquartile range of the absolute change values of the countries is given.
The mean (SD) of the absolute change values of the countries is given.