Data analyses
Descriptive analyses were used to describe the child/adolescent- and parent-experience measures in terms of median, frequencies and valid percent. The response option “Does not apply” in the CARE measure was treated as missing in the analyses. Normality was explored with skewness and kurtosis, and homogeneity in variances with the Levene’s test. A paired sample T-test was used to test for differences in parent experiences with previous healthcare (before the intervention) and parent experiences with the interdisciplinary intervention (right after the intervention). Bootstrapping was used as a sensitivity analysis. This is a robust method regarding the distributional form of the variable. Statistical significance level was set to 