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J Adolesc. 2011 Apr;34(2):391-5. doi: 10.1016/j.adolescence.2010.02.005. Epub 2010 Mar 19.

Brief report: behaviorally induced insufficient sleep syndrome in older adolescents: prevalence and correlates.

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Department of Psychosocial Science, Faculty of Psychology, University of Bergen, Christiesgt. 12, 5015 Bergen, Norway.


The aim of the present study was to investigate the prevalence of "behaviorally induced insufficient sleep syndrome (BIISS)" which is a newly defined hypersomnia, among adolescents. BIISS is characterized by excessive daytime sleepiness, short habitual sleep duration and sleeping considerably longer than usual during weekend/vacations. The study was conducted in the Hordaland County, Norway using a cluster sampling procedure. In all, 1285 high school students (aged 16-19 years) participated by completing self-report questionnaires on a computer. The estimated prevalence of BIISS was 10.4%. The results from logistic regression analyses showed that use of alcohol and living in an urban area were positively related to BIISS, whereas a high level of education in mothers was negatively related to BIISS. BIISS was associated with poor grades and symptoms of anxiety and depression.

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