Sleep duration and sleeping difficulties among adolescents: exploring associations with school stress, self-perception and technology use.

Sleeping problems are increasing among adolescents worldwide. This study aimed to describe the prevalence of self-reported sleep duration and sleeping difficulties, as well as to explore their associations with school stress, self-perception, that is how adolescents perceive their appearance and happiness, and technology use among adolescents. Data were collected in 2015 using a questionnaire. A total of 937 ninth grade adolescents, 15-16 years, from a city in western Sweden participated, resulting in a response rate of 83%. The result showed that 55% of the adolescents slept less than the recommended 8 hours per night and 11% had sleeping difficulties. School stress and technology use were associated with short sleep duration. School stress and self-perception were associated with sleeping difficulties. The girls had worse outcomes for sleeping difficulties, school stress, self-perception and technology use than the boys. Based on the results, there is a need for school nurses to implement preventive measures to improve adolescents' sleep.