Dutch Obesity Intervention in Teenagers: a school-based intervention program to improve dietary and physical activity behaviour in adolescents, in order to prevent excessive weight gain

ISRCTN	ISRCTN87127361
DOI	https://doi.org/10.1186/ISRCTN87127361
Secondary identifying numbers	2000T203

Submission date: 25/05/2005
Registration date: 04/07/2005
Last edited: 22/07/2015

Recruitment status: No longer recruiting
Overall study status: Completed
Condition category: Nutritional, Metabolic, Endocrine

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

Dr Marijke Jeanette Maidy Chin A Paw
Scientific

van der Boechorststraat 7
Amsterdam
1081 BT
Netherlands

Phone	+31 (0)20 4448203
Email	m.chinapaw@vumc.nl

Study information

Study design	Randomised controlled trial
Primary study design	Interventional
Secondary study design	Randomised controlled trial
Study setting(s)	School
Study type	Prevention
Scientific title	Dutch Obesity Intervention in Teenagers: a school-based intervention program to improve dietary and physical activity behaviour in adolescents, in order to prevent excessive weight gain
Study acronym	DOiT
Study objectives	It is hypothesised that the intervention will result in: 1. A difference between the intervention and the control group of at least 0.5 kg of body weight gain in favour of the intervention group after a one-year intervention period 2. Furthermore, a difference between the intervention and control group is expected of 7% (0.5 points on a 7-point scale) in cognitions (i.e. awareness, attitude, subject norm and self-efficacy) and 7% (0.5 points on a 7-point scale) in the behavioural intention of reaching a more favourable energy-balance
Ethics approval(s)	The Medical Ethical Committee of the VU University Medical Center
Health condition(s) or problem(s) studied	Overweight and obesity
Intervention	An educational program was developed and implemented in the biology and physical education lessons. These lessons aimed at increasing awareness and behavioural changes concerning energy intake, consumption of sugar-sweetened drinks and energy-dense snacks in particular; and energy output i.e. physical activity and sedentary behaviours. In addition, schools were advised on modifying the canteens, and requested to provide additional physical education classes in order to facilitate behavioural change. Furthermore, participants are requested to choose at least one of four intervention options aimed at the individual, two regarding physical activity and two regarding food intake. Control intervention: The regular school curriculum.
Intervention type	Behavioural
Primary outcome measure	Weight, height, and body composition (based on waist, arm, and thigh circumferences, and four skinfolds: triceps, biceps, subscapular, supra iliac), dietary behaviour (by questionnaires focusing on snacking and soft drinks), physical activity (by questionnaire in the whole group, and in a subgroup by accelerometers) and physical inactivity (by questionnaire).
Secondary outcome measures	1. Cognitions and intention (awareness, attitude, subjective norms, descriptive norms, self-efficacy - by questionnaire) related to recommended physical activity levels and dietary behaviours 2. Intention towards reaching a more favourable energy-balance 3. Compliance and appraisal of trial components (all by questionnaire) 4. Aerobic fitness by the 20 m shuttle run-test
Overall study start date	01/08/2002
Completion date	31/08/2006

Eligibility

Participant type(s)	Patient
Age group	Child
Lower age limit	12 Years
Upper age limit	14 Years
Sex	Both
Target number of participants	1070
Key inclusion criteria	Dutch adolescent boys and girls aged 12 - 14 years attending pre-vocational education
Key exclusion criteria	No exclusion criteria
Date of first enrolment	01/08/2002
Date of final enrolment	31/08/2006

Locations

Countries of recruitment

Netherlands

Study participating centre

van der Boechorststraat 7

Amsterdam
1081 BT
Netherlands

Sponsor information

The Netherlands Heart Foundation (NHF) (The Netherlands)
Charity

Bordewijklaan 3
Postbus 300
The Hague
2501 CH
Netherlands

Phone	+31 (0)70 315 55 55
Email	info@hartstichting.nl
"ROR"	https://ror.org/05nxhgm70

Funders

Funder type

Charity

The Netherlands Heart Foundation (NHF) (The Netherlands) (ref: 2000T203)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to share	No
IPD sharing plan summary	Not provided at time of registration
Publication and dissemination plan	Not provided at time of registration
IPD sharing plan

Study outputs

Output type	Details	Date created	Date added	Peer reviewed?	Patient-facing?
Protocol article	protocol	16/12/2006		Yes	No
Results article	results	01/12/2014		Yes	No