The Incredible Years in Norway: treatment of oppositional defiant and conduct problems in young Norwegian children

ISRCTN ISRCTN10430476
DOI https://doi.org/10.1186/ISRCTN10430476
Secondary identifying numbers N/A
Submission date
22/02/2008
Registration date
10/03/2008
Last edited
04/06/2019
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Mental and Behavioural Disorders
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data

Plain English summary of protocol

Not provided at time of registration

Study website

Contact information

Prof Willy-Tore Morch
Scientific

University of Tromso Faculty of Medicine
Centre of Child and Adolescent Mental Health
Tromsoe
N-9037
Norway

Phone +47 77 64 58 54
Email willy@fagmed.uit.no

Study information

Study designRandomised controlled trial
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeTreatment
Scientific titleTreatment of oppositional defiant and conduct problems in young Norwegian children: results of a randomised controlled replication trial
Study objectivesThe aims of the present study were to compare the effects of the Incredible Years (IY) basic parent training (PT) program, or PT combined with child therapy (PT+CT) to a waiting list control (WLC) condition in a randomised controlled trial including a one-year follow-up.
Ethics approval(s)Informed consent was obtained from all parents. The study was approved by The Regional Committee for Ethics in Medical Research, University of Tromsø, and by the Norwegian Data Inspectorate in January 2001.
Health condition(s) or problem(s) studiedOppositional defiant disorder and/or conduct disorder
InterventionThe treatment program, IY, was developed by Professor Carolyn Webster-Stratton at the parenting clinic at the University of Washington. IY is a manualised and video-based training program for young children with conduct problems.

In child training (CT), groups of six children met with two therapists in the clinic for 18 - 20 weekly two-hour sessions, in all 36 - 40 hours of treatment in the Incredible Years Dinosaur School Program. The parents to children in CT participated in PT parallel to the CT intervention.

The parents assigned to the PT condition were divided into groups of 10 - 12 parents (i.e. the parents of about six children in each group), who met weekly for 12 - 14 weeks for two hours with two accredited therapists. During the sessions, parents watched 250 video vignettes showing parent-child interactions. The therapists led discussions of central aspects of parenting on the basis of the video vignettes. The aims of the parent program are to promote parent competences and strengthen families by increasing parents' positive parenting, self-confidence in parenting, reduce negative parenting, improve parents' problem-solving skills and anger management, and improve school involvement. Parents receive home tasks and each session started with the parents describing their experience of these exercises.

Children/families in the waiting list condition (WLC) were offered treatment after six months of waiting, for ethical reasons and these children were unavailable at the one-year follow-up. The children/families underwent a three-hour assessment before and after the waiting period.

One year after ended treatment, a one-year follow-up assessment (12 months after terminated treatment) was conducted.
Intervention typeOther
Primary outcome measure1. Eyberg Child Behaviour Inventory (ECBI)
2. Kiddie-Schedule for Affective Disorders and Schizophrenia (Kiddie-SADS)

Assessments in the active treatment were conducted before treatment and at the end of the treatment interventions (approximately 21 - 24 weeks after the initiation of the intervention), and 12 months after the post-assessments the one-year follow-up was conducted. The WLC was not available at the one-year follow-up.
Secondary outcome measures1. Child Behaviour Checklist (CBCL)
2. Teacher Report Form (TFR)
3. Parental Stress Index (PSI)

Assessments in the active treatment were conducted before treatment and at the end of the treatment interventions (approximately 21 - 24 weeks after the initiation of the intervention), and 12 months after the post-assessments the one-year follow-up was conducted. The WLC was not available at the one-year follow-up.
Overall study start date01/09/2001
Completion date01/07/2004

Eligibility

Participant type(s)Patient
Age groupChild
Lower age limit4 Years
Upper age limit8 Years
SexBoth
Target number of participants127
Total final enrolment127
Key inclusion criteriaThe child characteristics for inclusion in the study were:
1. The child was 4 - 8 years old, either sex
2. The primary referral reason was misconduct (e.g., noncompliance, aggressive or oppositional behaviours)
3. The child’s behaviour was within the clinical range and above the 90th percentile (a score above 119 for girls and 126 for boys) on Eyberg Child Behaviour Inventory (ECBI) using Norwegian norms
4. The child met diagnostic criteria for oppositional defiant disorder (ODD) and/or conduct disorder (CD) according to standards set by the Diagnostic and Statistical Manual for Mental Disorders 4th edition (DSM-IV) or sub-clinical diagnostic criteria for ODD or CD
Key exclusion criteriaThe child had no debilitating physical impairment.
Date of first enrolment01/09/2001
Date of final enrolment01/07/2004

Locations

Countries of recruitment

  • Norway

Study participating centre

University of Tromso Faculty of Medicine
Tromsoe
N-9037
Norway

Sponsor information

Ministry of Health and Social Affairs (Norway)
Government

P.O. Box 7000
St Olavs Plass
Oslo
N-0130
Norway

Website http://www.shdir.no/
ROR logo "ROR" https://ror.org/01d2cn965

Funders

Funder type

Government

Ministry of Health and Social Affairs (Norway)

No information available

Norwegian Research Council (Norway)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Results article results 29/05/2018 04/06/2019 Yes No
Results article results 01/01/2009 04/06/2019 Yes No
Results article results 01/07/2010 04/06/2019 Yes No

Editorial Notes

04/06/2019: Total final enrolment and publication reference were added.