Table 3 Differences in general characteristics between participants and non-participants

Age

0.005

 0–5 years

248

34.9%

244

42.2%

 6–11 years

232

32.6%

190

32.9%

 12–17 years

231

32.5%

144

24.9%

 Missing

0

0

Sex

0.823

 Female

360

50.6%

288

50.0%

 Male

351

49.4%

288

50.0%

 Missing

0

2

Chronic disease

0.022

 Yes

120

16.9%

71

12.3%

 No

591

83.1%

507

87.7%

 Missing

0

0

Federal State

0.009

 Berlin

136

19.1%

151

26.2%

 Brandenburg

296

41.6%

226

39.2%

 MWP

279

39.2%

199

34.5%

 Missing

0

2

Region of residence

0.148

 Rural

220

30.9%

157

27.2%

 Semi-urban

227

31.9%

177

30.6%

 Urban

264

37.1%

244

42.2%

 Missing

0

0

Living space

0.017

 Birth parents

518

72.9%

393

68.0%

 Mother or father and new partner

75

10.5%

56

9.7%

 Only mother or father

112

15.8%

114

19.7%

 Other

6

0.8%

15

2.6%

 Missing

0

0

Siblings

0.007

 no

145

20.7%

130

23.1%

 1

318

45.4%

204

36.2%

 2

136

19.4%

112

19.9%

 3

54

7.7%

63

11.2%

  ≥ 4

48

6.8%

54

9.6%

 Missing

10

15

Country of birth

0.009

 Germany

661

94.0%

517

89.9%

 Other

42

6.0%

58

10.1%

 Missing

8

3

Migration background

0.002

 None

505

72.7%

359

63.3%

 One-sided

63

9.1%

65

11.5%

 Two-sided

127

18.3%

143

25.2%

 Missing

16

11

Spoken language at home

0.001

 German

494

69.6%

346

60.0%

 German and other language(s)

176

24.8%

175

30.3%

 Only other language(s)

40

5.6%

56

9.7%

 Missing

1

1

School leaving qualification^a

0.532

 None or low

100

14.5%

92

16.8%

 Medium

279

40.4%

214

39.1%

 High

312

45.2%

242

44.2%

 Missing

20

30

Vocational qualification^a

0.261

 None

68

10.0%

70

12.9%

 Completed vocational training

362

53.1%

274

50.4%

 Higher degrees^b

252

37.0%

200

36.8%

 Missing

29

34

Occupational status of mother

< 0.001

 Worker

201

28.9%

162

28.6%

 Employee

293

42.1%

179

31.6%

 Official

16

2.3%

8

1.4%

 Self-employed

19

2.7%

21

3.7%

 Other

71

10.2%

88

15.5%

 Unemployed

96

13.8%

108

19.1%

 Missing

15

12

Occupational status of father

0.380

 Worker

285

42.2%

224

41.3%

 Employee

224

33.1%

165

30.4%

 Official

29

4.3%

21

3.9%

 Self-employed

49

7.2%

36

6.6%

 Other

27

4.0%

32

5.9%

 Unemployed

62

9.2%

64

11.8%

 Missing

35

36

Household net income

0.020

  < €1000

60

9.2%

58

10.7%

 €1000—< €2000

174

26.8%

181

33.3%

 €2000—< €3000

172

26.5%

149

27.4%

 €3000—< €4000

140

21.6%

91

16.7%

  ≥ €4000

103

15.9%

65

11.9%

 Missing

62

34

Start of treatment with the current paediatrician

0.029

 During the first year of life

480

69.8%

364

64.5%

 Later

208

30.2%

200

35.5%

 Missing

23

14

Trust in the current paediatrician

< 0.001

 Very high

338

48.6%

204

36.6%

 Rather high

305

43.9%

276

49.5%

 Low/none

52

7.5%

78

14.0%

 Missing

16

20