Delayed sleep phase syndrome in adolescents: prevalence and correlates in a large population based study

BMC Public Health

Mari Hysing⁴  Astri J Lundervold⁵  Tormod Bøe⁴  Kjell Morten Stormark³  Ståle Pallesen¹  Børge Sivertsen² 

[1] Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital, Bergen, Norway;Department of Psychiatry, Helse Fonna HF, Haugesund, Norway;Department of Clinical Psychology, University of Bergen, Bergen, Norway;The Regional Centre for Child and Youth Mental Health and Child Welfare, Uni Health, Uni Research, Bergen, Norway;Department of Biological and Medical Psychology, University of Bergen, Bergen, Norway

关键词: Epidemiology;    Correlates;    Prevalence;    Sleep;    Delayes sleep phase syndrome;   

Others  :  1161462
DOI  :  10.1186/1471-2458-13-1163

 received in 2013-07-24, accepted in 2013-12-06,  发布年份 2013

【 摘 要 】

Background

The aims of this study were to estimate the prevalence of Delayed Sleep Phase Syndrome (DSPS) in adolescence, and to examine the association to insomnia and school non-attendance.

Methods

Data stem from a large population based study in Hordaland County in Norway conducted in 2012, the ung@hordaland study. In all, 10,220 adolescents aged 16–18 years (54% girls) provided self-reported data on a range of sleep parameters: DSPS was defined according to the International Classification of Sleep Disorders, Revised (ICSD-R) criteria, while insomnia was defined according to the Quantitative Criteria for Insomnia. Other sleep parameters included time in bed, sleep duration, sleep efficiency, oversleeping, sleep onset latency, wake after sleep onset, subjective sleep need, sleep deficiency, sleepiness and tiredness. Sleep data were calculated separately for weekdays and weekends. Data on school non-attendance were provided by official registers.

Results

The prevalence of DSPS was 3.3%, and significantly higher among girls (3.7%) than boys (2.7%). There was a strong overlap between DSPS and insomnia, with more than half of the adolescents with DSPS also meeting the criteria for insomnia (53.8% for boys and 57.1% for girls). Adolescents with DSPS had significantly higher odds ratios (OR) of non-attendance at school. After adjusting for sociodeographical factors, insomnia and depression, the adjusted ORs for days of non-attendance were OR = 3.22 (95% CI: 1.94-5.34) for boys and OR = 1.87 (95% CI: 1.25-2.80) for girls. A similar effect was found for hours of non-attendance for boys, with an adjusted OR = 3.05 (95% CI: 1.89-4.92). The effect for girls was no longer significant after full adjustment (OR =1.48 [95% CI: 0.94-2.32]).

Conclusions

This is one of the first studies to estimate the prevalence of DSPS in adolescents. The high prevalence of DSPS, and overlap with insomnia, in combination with the odds of school non-attendance, suggest that a broad and thorough clinical approach is warranted when adolescents present with symptoms of DSPS.

【 授权许可】

   
2013 Sivertsen et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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