en: The study is compiled from data from the Icelandic part of an international study Health Behavior in School-Aged Children: HBSC.
is: Rannsóknin er unnin úr gagnasafni úr íslenska hluta alþjóðlegu rannsóknarinnar Heilsa og lífskjör skólanema (Health Behavior in School-aged Children: HBSC).