Figure 2
The flowchart begins with the recruitment phase, which involves six study schools in Eastern Finland. These schools are divided into two groups: three intervention schools with 19 classes and 387 students, and three control schools with 21 classes and 444 students. Both groups start with a pre-intervention questionnaire. Following this, the intervention schools undergo an intervention process, while the control schools do not. After the intervention period, both groups complete a post-intervention questionnaire. The intervention schools include an intervention evaluation in their post-intervention questionnaire. Finally, both groups participate in a delayed questionnaire.Recruitment and data collection