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Table 2 Socio-demographic characteristics of participating and non-participating children in the ChiBS study (2010, Aalter, Belgium)

From: Children’s Body composition and Stress – the ChiBS study: aims, design, methods, population and participation characteristics

 

ChiBS participants*

ChiBS non-participants**

χ²-test

 

%

N

%

N

p-value

child characteristics

   

sex

    

0.634

male

49.3

258

51.3

117

 

female

50.7

265

48.7

111

 

age (years)

    

<0.001

5

0.4

2

55.7

127

 

6

11.9

62

19.3

44

 

7

24.7

129

7.5

17

 

8

26.6

139

6.6

15

 

9

24.9

130

7.0

16

 

10

11.1

58

3.1

7

 

11

0.6

3

0.9

2

 

BMI

    

0.550

underweight

13.6

71

11.8

27

 

normal

79.3

415

82.0

187

 

overweight

5.5

29

5.7

13

 

obese

1.5

8

0.4

1

 

parental characteristics

  

household income (missing = 108)

  

(missing n = 35)

0.377

low to low/medium

5.3

21

5.7

11

 

medium

3.3

172

38.2

87

 

high/medium

20.7

108

23.2

53

 

high

21.5

112

18.4

42

 

education (ISCED) (missing n = 30)

  

(missing n = 12)

0.163

level 1

0.6

3

0.9

2

 

level 2

0.6

3

2.6

6

 

level 3

24.7

129

27.6

63

 

level 4

20.7

108

18.9

43

 

level 5 or higher

47.8

250

44.7

102

 

family structure (missing n = 32)

  

(missing n = 13)

0.066

traditional

76.9

402

82.5

188

 

non-traditional

17.0

89

11.8

27

 

migrant status

     

father migrant

1.1

6

2.2

5

0.770

mother migrant

3.4

18

3.1

7

0.274

  1. * children participating in the baseline ChiBS stress-questionnaire; ** children participating in the IDEFICS study but not in the ChiBS study; BMI body mass index with cut-offs as determined by the International Obesity Task Force classification; household income categories based on national statistics, ISCED International Standard Classification for EDucation (1 ‘primary education’, 2 ‘lower secondary education’, 3 ‘upper secondary education’, 4 ‘post-secondary non-tertiary education’, 5 or higher ‘tertiary education’); traditional family structure: children living with both biological parents – non-traditional family structure: all other family structures.