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  • 1.
    Danielsson, Nanette
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Centre for Research on Child and Adolescent Mental Health.
    Norell-Clarke, Annika
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for Research on Child and Adolescent Mental Health (from 2013).
    Hagquist, Curt
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for Research on Child and Adolescent Mental Health (from 2013). Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Health Sciences (from 2013).
    Associations between adolescent sleep disturbance and different worry themes: findings from a repeated cross-sectional study from 1988 to 20112016In: Sleep Health, ISSN 2352-7218, E-ISSN 2352-7226, Vol. 2, no 3, p. 194-197Article in journal (Refereed)
    Abstract [en]

    Objective

    The objective was to investigate relationships between adolescent sleep disturbance and various worry themes.

    Methods

    Questionnaire data from 8 cross-sectional collections between 1988 and 2011 were used. The sample included more than 20,000 adolescents aged 15-16. Binary logistic regressions were used for the analyses.

    Results

    Sleep disturbance and female sex increased the odds of worrying about all themes. Sleep disturbance shared stronger associations with worry about financial security, accidents/illness, being bullied, and terrorist attacks (odds ratios, 2.65-3.35) compared with worry about environmental destruction or nuclear war (odds ratios, 1.73-2.11). No interactions between sleep and year of investigation were found.

    Conclusions

    Little is known about the association between adolescent worry and sleep, and about sleep disturbance and specific worry content. This study shows that the strength in the relationship between adolescent worry and sleep varies with worry themes. Knowledge of the worry content related to sleep may aid in targeting preventions and interventions.

  • 2.
    Johansson, Magnus
    et al.
    Stockholms universitet.
    Jansson-Fröjmark, Markus
    Stockholms universitet.
    Norell-Clarke, Annika
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for Research on Child and Adolescent Mental Health (from 2013).
    Linton, Steven
    Örebro universitet.
    The role of psychiatric and somatic conditions in incidence and persistence of insomnia: a longitudinal, community study2016In: Sleep Health, ISSN 2352-7218, E-ISSN 2352-7226, Vol. 2, no 3, p. 229-238Article in journal (Refereed)
    Abstract [en]

    ObjectiveThe objective was to investigate the role of psychiatric and somatic conditions in incident and persistent insomnia.DesignThis was a prospective study with 3 measurement points over 1.5 years.SettingThe participants were sent a survey to their home addresses.ParticipantsA survey was sent out to 5000 random individuals (18-70 years) in 2 Swedish counties. To those who returned the baseline questionnaire (n = 2333), 2 follow-up surveys (6 and 18 months later) were sent out and completed by 1887 and 1795 individuals, respectively.MeasurementsThe survey contained questions about sociodemographic factors and insomnia symptomatology, the Hospital Anxiety and Depression Scale, and items assessing 12 forms of somatic conditions (eg, heart disease and headache).ResultsBaseline depression, headache, and number of psychiatric and somatic conditions were found to be independent risk factors for incident insomnia. Also, deterioration in depression and heart disease status and increased number of conditions over time increased the risk for insomnia incidence. Anxiety; depression; pain in neck, back, or shoulders; and headache at baseline were found to significantly discriminate between those with persistent insomnia and those with persistent normal sleep. Those with persistent insomnia also reported a higher number of conditions relative to those with persistent normal sleep. None of the psychiatric or somatic conditions were found to be associated with persistence of insomnia relative to remission of insomnia.ConclusionThe current study suggests that both psychiatric and somatic conditions are involved in the incidence but not in the persistence of insomnia. Clinical and theoretical implications of the results are discussed.

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