Table 3 Results of the linear mixed effects model with the KINDL subscale scores parent proxy-report as dependent variable controlled for time, age (in years), sex, educational level of the parents and diagnoses

Intercept

80.71

[73.72; 87.70]

 < 0.001

87.36

[82.02; 92.69]

 < 0.001

78.97

[73.04; 84.91]

 < 0.001

81.53

[75.86; 87.19]

 < 0.001

84.02

[78.1; 89.94]

 < 0.01

82.99

[75.87; 90.11]

 < 0.001

Time

 Baseline

Reference

Reference

Reference

Reference

Reference

Reference

 Follow-Up

0.11

[-1.96; 2.18]

0.920

-0.55

[-1.90; 0.81]

0.429

0.24

[-1.35; 1.82]

0.772

-0.55

[-2.07; 0.97]

0.475

-0.84

[-2.49; 0.80]

0.314

-0.97

[-2.82; 0.89]

0.308

Group of the child

 Control

Reference

Reference

Reference

Reference

Reference

Reference

 Intervention

0.29

[-2.05; 2.64]

0.807

0.57

[-1.22; 2.37]

0.531

0.41

[-1.57; 2.39]

0.682

1.78

[-0.13; 3.69]

0.068

-0.53

[-2.51; 1.46]

0.603

1.7

[-0.68; 4.08]

0.162

Age of the child (in years)

-0.16

[-0.62; 0.31]

0.508

-0.73

[-1.08; -0.37]

 < 0.001

-0.77

[-1.17; -0.38]

 < 0.001

-0.37

[-0.75; 0]

0.053

0.05

[-0.34; 0.45]

0.793

-0.67

[-1.15; -0.18]

0.007

Sex of the child

 Female

Reference

Reference

Reference

Reference

Reference

Reference

 Male

-0.42

[-2.55; 1.71]

0.698

-1.01

[-2.66; 0.63]

0.227

-1.96

[-3.77; -0.16]

0.033

-0.90

[-2.64; 0.85]

0.313

-2.45

[-4.26; -0.64]

0.008

-4.12

[-6.3; -1.93]

 < 0.001

Educational level of the parent

 Low

Reference

Reference

Reference

Reference

Reference

Reference

 Medium

3.58

[-0.47; 7.64]

0.083

2.22

[-0.87; 5.31]

0.160

2.55

[-0.86; 5.97]

0.143

-0.30

[-3.59; 2.99]

0.858

0.46

[-2.97; 3.89]

0.793

0.65

[-3.46; 4.75]

0.757

 High

3.95

[0.01; 7.89]

1.13

[-1.88; 4.14]

1.91

[-1.41; 5.23]

-2.31

[-5.51; 0.9]

-1.34

[-4.68; 1.99]

-0.05

[-4.05; 3.94]

HAP^b

-5.55

[-10.87; -0.23]

0.041

-0.42

[-4.47; 3.63]

0.839

-0.63

[-5.16; 3.90]

0.785

3.72

[-0.58; 8.02]

0.090

-1.61

[-6.11; 2.89]

0.484

-0.56

[-5.93; 4.82]

0.839

SLD^b

-0.96

[-5.86; 3.94]

0.702

1.79

[-1.95; 5.54]

0.347

-0.19

[-4.37; 3.99]

0.929

2.40

[-1.57; 6.38]

0.236

-1.66

[-5.81; 2.50]

0.434

2.95

[-2.01; 7.91]

0.243

NE^b

-4.31

[-9.61; 0.98]

0.110

-0.62

[-4.74; 3.5]

0.769

0.13

[-4.41; 4.68]

0.954

-0.12

[-4.48; 4.24]

0.957

-0.9

[-5.43; 3.62]

0.696

1.83

[-3.6; 7.27]

0.509

CD^b

-2.15

[-7.03; 2.74]

0.389

-0.57

[-4.29; 3.16]

0.7659

-2.55

[-6.72; 1.61]

0.229

-1.58

[-5.54; 2.39]

0.436

-4.56

[-8.69; -0.42]

0.031

-1.64

[-6.57; 3.29]

0.514

Interaction: Time × Group

-1.45

[-4.41; 1.51]

0.336

0.51

[-1.44; 2.45]

0.609

-2.02

[-4.3; 0.25]

0.082

-0.78

[-2.95; 1.39]

0.482

0.54

[-1.81; 2.89]

0.653

-0.71

[-3.36; 1.93]

0.597

Variance Intercept

121.21

93.02

103.86

98.24

99.70

157.66

AIC^c

12168.30

11230.51

11559.19

11482.33

11604.12

11834.10