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Article type: Research Article
Authors: Johnson, Keith A.a; b; * | Gordon, Christopher J.a; c | Grunstein, Ronald R.a; b
Affiliations: [a] CIRUS, Centre for Sleep and Chronobiology, Woolcock Institute of Medical Research, Sydney, NSW, Australia | [b] Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia | [c] Susan Wakil School of Nursing, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW, Australia
Correspondence: [*] Address for correspondence: Keith A. Johnson, Woolcock Institute of Medical Research, Sydney Medical School, University of Sydney, PO Box M77, Missenden Road, Sydney, NSW 2050, Australia. Tel.: +61 (2)9114 0411; Fax: +61 (2) 9114 0014; E-mail: [email protected].
Abstract: BACKGROUND:Previous studies examining insomnia in populations with traumatic brain injury (TBI) have not distinguished between transient insomnia symptoms and insomnia disorder and associations have been confounded by other highly prevalent sleep disorders post-TBI. OBJECTIVE:To investigate the associations between affective symptoms and somatoform symptoms in patients with TBI and insomnia, sleep apnoea and hypersomnolence. METHODS:Twenty-four participants from a multidisciplinary brain injury rehabilitation service with TBI were assessed for insomnia disorder, using Diagnostic and Statistical Manual Fifth Edition (DSM-5) criteria. Associations with affective and somatic symptoms were assessed, using the DASS-21 and PHQ-15 respectively. The same cohort was divided for Obstructive Sleep Apnoea (OSA) and hypersomnolence and analysed for the same outcomes. Associations were assessed using Pearson’s correlation and a logistic binary regression model was developed to predict insomnia in patients with brain injury. RESULTS:The insomnia disorder group (n = 11) had significantly higher rates somatoform symptoms (p < 0.05), compared to those without insomnia disorder (n = 13). These factors were not significantly associated with OSA or hypersomnolence. Pain was significantly associated with insomnia disorder. CONCLUSIONS:Insomnia disorder, not OSA or hypersomnolence, may be related to the presence of somatoform symptoms in people with TBI. Addressing insomnia disorder may potentially improve recovery.
Keywords: Somatoform symptoms, brain injury, insomnia disorder
DOI: 10.3233/NRE-192868
Journal: NeuroRehabilitation, vol. 45, no. 3, pp. 409-418, 2019
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