Furthermore, we found a difference in overall risk between children with and without completed self-report questionnaires. The group with completed questionnaires formed 66.9% of the total group, but included only 34.8% of the high risk labels. The group without questionnaires thus formed 33.1% of the total group, with 65.2% of the high risk labels. This difference in distribution is highly significant (p < 0.001).