Data used was obtained from the Icelandic portion of the international study Health Behaviours in School-Aged Children (HBSC) which is conducted every four years and is supported by the World Health Organization (WHO).
Notast var við fyrirliggjandi gögn úr íslenska hlutanum í alþjóðlegu rannsókninni Health Behaviours in School-Aged Children (HBSC), sem framkvæmd er á fjögurra ára fresti og styrkt af Alþjóðaheilbrigðismálastofnuninni (WHO).