Data were collected from the Health Behaviour in School-aged Children survey, a nationally representative cross-section of Icelandic youth in grades 6, 8 and 10 (N = 11.019) conducted in 2013–14.
Verkefnið byggir á landskönnuninni Heilsa og lífskjör skólanema (HBSC) sem fór fram á Íslandi skólaárið 2013-2014.