| Summary: | Abstract
Sleep has been found to be an important factor in adolescents’
mental and physical health. The aim of the present study was to
examine trends in sleep difficulty (i.e., difficulty falling asleep
more often than once a week) in the Nordic countries among 11- to
15-year-olds. We analysed Nordic data from the Health Behaviour
in School-aged Children study (HBSC), which is conducted every four
years, looking specifically at trends in sleep difficulty over a
12-year period from 2002 to 2014. The participants were aged 11
to 15 years. The total number of participants across these years
was 113,447. A large percentage (17% to 31% in 2014) of adolescents
in the Nordic countries experience sleep difficulty, and these difficulties
increased from 2002 to 2014 in Denmark, Finland, Iceland, and Sweden.
Only in Norway was there a decrease, mainly due to a reduction in
sleep difficulty among 11-year-old boys and girls from 2010 to 2014.
Sleep difficulty among boys and girls are prevalent and generally
on the rise in the Nordic countries with the exception of Norway.
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