Table 5 Results of the linear mixed effects model with the VAS score as dependent variable controlled for time, age (in years), sex, educational level of the parent who answered the questionnaire, and diagnosis and health-related quality of life of the child

Intercept

56.07

[47.42, 64.72]

 < 0.001

Time

 Baseline

Reference

 Follow-Up

2.59

[1.29; 3.88]

 < 0.001

Group of the child

 Control

Reference

 Intervention

1.07

[-0.66; 2.80]

0.225

Age of the parent [years]

0.02

[-0.13; 0.17]

0.787

Sex of the parent

 female

Reference

 male

0.01

[-2.53; 2.56]

0.991

Educational level of the parent

 Low

Reference

 Medium

-0.74

[-3.23; 1.75]

0.561

 High

-0.14

[-2.40; 2.69]

Diagnosis group child^b

 HAP

-0.95

[-4.93; 3.02]

0.638

 SLD

-0.60

[-4.29; 3.10]

0.752

 NE

-1.42

[-5.49; 2.65]

0.494

 CD

-1.19

[-4.86; 2.48]

0.526

HRQoL child^c

0.36

[0.30; 0.42]

 < 0.001

Interaction: Time × Group

-1.72

[-3.59; 0.15]

0.071

AIC^d

11,723.31