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  • 1. Broström, Anders
    et al.
    Ulander, Martin
    Nilsen, Per
    Svanborg, Eva
    Årestedt, Kristofer
    Linnaeus University, Faculty of Health, Social Work and Behavioural Sciences, School of Health and Caring Sciences. Linköpings universitet.
    The attitudes to CPAP treatment inventory: development and initial validation of a new tool for measuring attitudes to CPAP treatment.2011In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 20, no 3, p. 460-471Article in journal (Refereed)
    Abstract [en]

    Continuous positive airway pressure (CPAP) is the treatment of choice for obstructive sleep apnoea syndrome (OSAS), but low adherence rates are common. The aim was to develop the attitudes to CPAP treatment inventory (ACTI), and to investigate the validity and reliability of the instrument among patients with OSAS. ACTI was developed on the basis of: (i) in-depth interviews with 23 patients; (ii) examination of the scientific literature; and (iii) consensus agreement of a multi-professional expert panel. This yielded five different types of attitudes to CPAP treatment. A prospective longitudinal design was used. Two-hundred and eighty-nine patients with OSAS were recruited at three different CPAP centres. Data were collected with ACTI and obtained from medical records. The homogeneity and internal consistency reliability were satisfactorily reflected by the item-total correlations (0.59-0.81) and Cronbach's alpha (0.89), respectively. Construct validity was confirmed with factor analysis (principal component analysis with orthogonal rotation; PCF). The PCF based on baseline data resulted in a one single-factor solution explaining 69% of the total variance. A confirmatory factor analysis was performed 2 weeks after CPAP initiation, resulting in the same factor solution. No indication of uniform differential item functioning was found. The predictive validity was tested with receiver operating characteristic analyses, and a cut-off of 10 on the ACTI gave a sensitivity of 93% and a specificity of 44% for CPAP termination within 6 months. The satisfactory measurement properties of this new pragmatic instrument are promising and indicate that ACTI can be useful in clinical practice to reliably measure attitudes to CPAP treatment.

  • 2. Broström, Anders
    et al.
    Årestedt, Kristofer
    Linnaeus University, Faculty of Health, Social Work and Behavioural Sciences, School of Health and Caring Sciences. Linköpings universitet.
    Nilsen, Per
    Strömberg, Anna
    Ulander, Martin
    Svanborg, Eva
    The side-effects to CPAP treatment inventory: the development and initial validation of a new tool for the measurement of side-effects to CPAP treatment.2010In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 19, no 4, p. 603-611Article in journal (Refereed)
    Abstract [en]

    Continuous positive airway pressure (CPAP) is the treatment of choice for obstructive sleep apnoea syndrome (OSAS), but side-effects are common. No validated self-rating scale measuring side-effects to CPAP treatment exists today. The aim was to develop the side-effects to CPAP treatment inventory (SECI), and investigate the validity and reliability of the instrument among patients with OSAS. SECI was developed on the basis of: (1) in-depth interviews with 23 patients; (2) examination of the scientific literature and (3) consensus agreement of a multi-professional expert panel. This yielded 15 different types of side-effects related to CPAP treatment. Each side-effect has three sub-questions (scales): perceived frequency (a) and magnitude (b) of the side-effect, as well as its perceived impact on CPAP use (c). A cross-sectional descriptive design was used. A total of 329 patients with OSAS with an average use of CPAP treatment for 39 months (2 weeks to 182 months) were recruited. Data were collected with SECI, and obtained from medical records (clinical variables and data related to CPAP treatment). Construct validity was confirmed with factor analysis (principal component analysis with orthogonal rotation). A logical two-factor solution, the device subscale and symptom subscale, emerged across all three scales. The symptom subscale describing physical and psychological side-effects and the device subscale described mask and device-related side-effects. Internal consistency reliability of the three scales was good (Cronbach's α = 0.74-0.86) and acceptable for the subscales (Cronbach's α = 0.62-0.86). The satisfactory measurement properties of this new instrument are promising and indicate that SECI can be used to measure side-effects to CPAP treatment.

  • 3.
    Jernelov, S.
    et al.
    Karolinska Institutet.
    Lekander, M.
    Karolinska Institutet;Stockholm University.
    Blom, K.
    Karolinska Institutet.
    Kaldo, Viktor
    Linnaeus University, Faculty of Health and Life Sciences, Department of Psychology. Karolinska Institutet.
    One and ten-year follow-up of insomnia severity after a randomized trial of behavioral self-help treatment for insomnia with or without therapist guidance2018In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 27Article in journal (Other academic)
  • 4.
    Pedersen, Maria
    et al.
    University of Oslo, Norway ; Akershus University Hospital, Norway.
    Ekstedt, Mirjam
    Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences. Karolinska Institutet.
    Småstuen, Milada C.
    Akershus University College of Applied Sciences, Norway.
    Wyller, Vegard B.
    University of Oslo, Norway ; Akershus University Hospital, Norway.
    Sulheim, Dag
    Innlandet Hospital Trust, Norway.
    Fagermoen, Even
    Oslo University Hospital, Norway.
    Winger, Anette
    Akershus University College of Applied Sciences, Norway.
    Pedersen, Edvard
    UiT The Arctic University of Norway, Norway.
    Hrubos-Strøm, Harald
    Akershus University Hospital, Norway.
    Sleep-wake rhythm disturbances and perceived sleep in adolescent chronic fatigue syndrome2017In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 26, no 5, p. 595-601Article in journal (Refereed)
    Abstract [en]

    Chronic fatigue syndrome (CFS) is characterized by long-lasting, disabling and unexplained fatigue that is often accompanied by unrefreshing sleep. The aim of this cross-sectional study was to investigate sleep-wake rhythm and perceived sleep in adolescent CFS patients compared to healthy individuals. We analysed baseline data on 120 adolescent CFS patients and 39 healthy individuals included in the NorCAPITAL project. Activity measures from a uniaxial accelerometer (activPAL) were used to estimate mid-sleep time (mid-point of a period with sleep) and time in bed. Scores from the Karolinska Sleep Questionnaire (KSQ) were also assessed. The activity measures showed that the CFS patients stayed significantly longer in bed, had a significantly delayed mid-sleep time and a more varied sleep-wake rhythm during weekdays compared with healthy individuals. On the KSQ, the CFS patients reported significantly more insomnia symptoms, sleepiness, awakening problems and a longer sleep onset latency than healthy individuals. These results might indicate that disrupted sleep-wake phase could contribute to adolescent CFS; however, further investigations are warranted.

  • 5.
    Rosen, A.
    et al.
    Karolinska Institutet.
    Jernelov, S.
    Karolinska Institutet.
    Kaldo, Viktor
    Linnaeus University, Faculty of Health and Life Sciences, Department of Psychology. Karolinska Institutet.
    Forsell, E.
    Karolinska Institutet.
    Akerstedt, T.
    Karolinska Institutet.
    D'onofrio, P.
    Stockholm University.
    Cognitive behavior therapy for insomnia - is sleep compression an equally effective and less difficult alternative compared to sleep restriction?2018In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 27Article in journal (Other academic)
  • 6. Ulander, M.
    et al.
    Brostrom, A.
    Årestedt, Kristofer
    Linnaeus University, Faculty of Health, Social Work and Behavioural Sciences, School of Health and Caring Sciences.
    Svanborg, E.
    Differences in the level of sleepiness measured by the different items of the Epworth sleepiness scale: a comparison to the Multiple sleep latency test2012In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 21, p. 308-308Article in journal (Other academic)
  • 7.
    Xiu, L.
    et al.
    Karolinska Institutet.
    Hagstromer, M.
    Karolinska Institutet.
    Bergqvist, L.
    Karolinska Institutet.
    Johansson, E.
    Karolinska Institutet.
    Ekbom, K.
    Karolinska Institutet.
    Svensson, V.
    Karolinska Institutet.
    Marcus, C.
    Karolinska Institutet.
    Ekstedt, Mirjam
    Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences. Karolinska Institutet.
    Weekday-weekend sleep variations in young children and the associated family factors2018In: Journal of Sleep Research, ISSN 0962-1105, E-ISSN 1365-2869, Vol. 27Article in journal (Other academic)
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