Hester van Eeren

| Chapter 5 5 | 118 Supplemental Material Table I: Excluded versus included adolescents due to missing outcome measure after treatment (FFT) Variable Excluded (N = 365) Continuous variables Mean SD Age 15.95 1.65 CBCL Internalizing problems 62.5 10.45 Primary outcome Externalizing problems 65.88 10.49 Total behavioral problems 65.17 9.93 YSR Internalizing problems 53.54 10.78 Externalizing problems 58.01 10.28 Total behavioral problems 65.05 9.53 Parenting stress 2 1.92 Categorical variables % Gender Male 50.1 Female 49.9 Country of birth Netherlands 90.1 Western country 3.3 Non-Western country 6.6 Living situation adolescent Together with one parent 45.0 Together with multiple parents 48.8 Other 6.1 Living situation adolescent Lived not at home 2.1 Secondary outcome Lived at home 97.9 Level of education None 9.2 Primary education 4.0 Lower secondary education 52.5 Higher secondary education 34.0 Higher education 0.3 Previous treatment Absent 10.4 Engagement in school or work Absent 20.3 Secondary outcome Present 79.7 Court order No 67.0 Civil 18.7 Criminal 14.3 Police contacts during treatment Absent 73.4 Secondary outcome Present 26.6 Relation father Absent 10.2 Present 89.8 Relation mother Absent 1.2 Present 98.8 Relation siblings Absent 9.2 Present 90.8 Relation peers Absent 0.6 Present 99.4