10 Although the results of this study are in line with the results from the meta-analysis, further research should also investigate the postintervention effect for better evaluating the effectiveness of the intervention as well as determining an optimal time line for the boosting intervention.
Prompts will be sent to the experimental group to boost intervention use [ 41] with a two week time interval and some referring to new content on the website, since this may increase the number of follow-up visits [ 42].
Such efforts of aristocratic and financial elites to snatch up and profit from land spawned new economic philosophies, like georgism, and boosted policy interventions, like the land value tax.
To examine barriers and facilitators to teachers' implementation of the curricular component of the school-based, multicomponent Boost intervention to promote fruit and vegetable intake among 13-year-olds guided by concepts of Diffusion of Innovations Theory and findings of previous implementation studies.
This hypothesis can be tested in the quantitative effect analysis of the Boost intervention.
Two teachers from each intervention school, preferably the local coordinators, were invited to a one- day pre- intervention workshop to prepare them for implementation of the Boost intervention.
These challenges prompted the development of the multicomponent Boost intervention aimed at increasing FV intake in 13-year-old Danish adolescents.
The effectiveness of the Boost intervention was tested in a cluster-randomised controlled study design with 20 intervention- and 20 control schools randomly selected from a random sample of ten Danish municipalities.
Pupils ' appreciation of the Boost intervention : Based on pupil follow-up data on how much they had appreciated participating in the Boost project, pupils were dichotomized into high pupil appreciation (really liked /liked to participate) versus low (neither liked nor disliked/did not like/did not like it at all/do not know the Boost project).
Other studies also highlight time issues as crucial for implementation of interventions [ 6, 14, 28, 41- 45] (Suldrup Jørgensen T, Krølner R, Tjørnhøj-Thomsen T, Aarestrup AK, Due P, Rasmussen M: Barriers and facilitators for teachers' implementation of the curricular component of the Boost intervention targeting adolescents' fruit and vegetable intake, submitted).
They found that the personalised email and the sweets, which aimed to induce reciprocity, were the most powerful interventions, boosting the proportion of participants donating from 5 per cent to 17 per cent.
