Table 2 Results of the linear mixed effects models with the KINDL total score parent proxy-report and KINDL total score child self-report as dependent variables controlled for time, age (in years), sex, educational level of the parents and diagnoses

Intercept

82.36

[77.86; 86.85]

 < 0.001

82.73

[61.54, 103.92]

 < 0.001

Time

 Baseline

Reference

Reference

 Follow-Up

-0.43

[-1.52, 0.67]

0.443

1.65

[-1.46, 4.76]

0.299

Group of the child

 Control

Reference

Reference

 Intervention

0.64

[-0.85, 2.14]

0.400

1.71

[-2.92, 6.35]

0.469

Age of the child (in years)

-0.42

[-0.73, -0.11]

0.007

-0.81

[-2.10, 0.49]

0.223

Sex of the child

 Female

Reference

Reference

 Male

-1.73

[-3.11, -0.36]

0.014

-0.18

[-4.60, 4.23]

0.936

Educational level of the parent

 Low

Reference

Reference

 Medium

1.62

[-0.95, 4.19]

0.217

1.61

[-5.36, 8.58]

0.651

 High

0.58

[-1.92, 3.08]

0.649

-1.97

[-8.62, 4.68]

0.562

HAP^a

-0.96

[-4.36, 2.44]

0.579

0.53

[-9.83, 10.90]

0.920

SLD^a

0.82

[-2.32, 3.97]

0.607

-0.08

[-9.77, 9.61]

0.987

NE^a

-0.69

[-4.14, 2.75]

0.693

-1.52

[-12.26, 9.23]

0.782

CD^a

-2.18

[-5.30, 0.94]

0.171

-1.47

[-11.52, 8.58]

0.774

Interaction: Time × Group

-0.55

[-2.11, 1.02]

0.493

-2.43

[-7.33, 2.46]

0.329

Variance Intercept

67.02

116.55

AIC^b

10440.35

2011.67