Brug, J.

study health intervention activity intake adolescent children behavior group change school fruit factor obesity behaviour effect association level vegetable consumption weight research review education result table model difference parent determinant intention questionnaire netherland environment measure number information nutrition analyses signi sport sample participant internet respondent control people smoking journal neighbourhood theory country prevention availability stage dutch drink process perception status baseline follow-up ficant score population habit adult variable implementation feedback vegetable intake habit strength university child vegetable consumption attitude fluence weight gain energy month