Abstract
BackgroundThe evidence-based Dutch Obesity Intervention in Teenagers (DOiT) program is a school-based obesity prevention program for 12 to 14-year olds attending the first two years of prevocational education. This paper describes the study protocol applied to evaluate (a) the nationwide dissemination process of DOiT in the Netherlands, and (b) the relationship between quality of implementation and effectiveness during nationwide dissemination of the program in the Netherlands.MethodsIn order to explore facilitating factors and barriers for dissemination of DOiT, we monitored the process of adoption, implementation and continuation of the DOiT program among 20 prevocational schools in the Netherlands. The study was an observational study using qualitative (i.e. semi-structured interviews) and quantitative methods (i.e. questionnaires and logbooks). Eight process indicators were assessed: recruitment, context, reach, dosage, fidelity, satisfaction, effectiveness and continuation. All teachers, students and parents involved in the implementation of the program were invited to participate in the study. As part of the process evaluation, a cluster-controlled trial with ten control schools was conducted to evaluate the effectiveness of the program on students’ anthropometry and energy balance-related behaviours and its association with quality of implementation.DiscussionThe identified impeding and facilitating factors will contribute to an adjusted strategy promoting adoption, implementation and continuation of the DOiT program to ensure optimal use and, thereby, prevention of obesity in Dutch adolescents.Trial registrationCurrent Controlled Trials ISRCTN92755979.
Highlights
The evidence-based Dutch Obesity Intervention in Teenagers (DOiT) program is a school-based obesity prevention program for 12 to 14-year olds attending the first two years of prevocational education
The Dutch Obesity Intervention in Teenagers (DOiT) program is an example of a health-promotion initiative that was ready for nationwide dissemination
Implementation strategy Using the Intervention Mapping (IM) protocol, we developed the implementation strategy with the input of different implementation stakeholders
Summary
The evidence-based Dutch Obesity Intervention in Teenagers (DOiT) program is a school-based obesity prevention program for 12 to 14-year olds attending the first two years of prevocational education. How health-promotion programs perform, when widely disseminated under real-life conditions, has rarely evaluated [1]. The Dutch Obesity Intervention in Teenagers (DOiT) program is an example of a health-promotion initiative that was ready for nationwide dissemination. DOiT is a school-based obesity prevention program for students attending the first two years of prevocational education (about 12–14 year olds). The program was developed using the Intervention Mapping (IM) protocol. Intervention Mapping is a protocol for developing health promotion interventions. The protocol supports intervention developers to identify and specify objectives, methods, and strategies regarding development, evaluation and implementation of interventions and programs [7]
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