• Grigorios Kotronoulas, Yvonne Wengstrom, and Nora Kearney.
• School of Nursing & Midwifery, University of Dundee, Scotland. g.kotronoulas@dundee.ac.uk
• Cancer Nurs. 2013 Jan 1;36(1):E1-15.

BackgroundSleep is increasingly recognized as an area of functioning that may be greatly affected in persons who are practically and emotionally involved in the care of patients with cancer. Clinician awareness is required to ensure that effective care for informal caregivers with sleep problems is provided.ObjectiveA 2-fold critical review of the published literature was conducted, which aimed at summarizing and critically analyzing evidence regarding sleep patterns of informal caregivers of adults with cancer and contributing factors to sleep-wake disturbances.MethodsUsing a wide range of key terms and synonyms, 3 electronic databases (MEDLINE, CINAHL, EMBASE) were systematically searched for the period between January 1990 and July 2011.ResultsBased on prespecified selection criteria, 44 articles were pooled to provide evidence on sleep-impairing factors in the context of informal caregiving, 17 of which specifically addressed sleep patterns of caregivers of people with cancer.ConclusionsAt least 4 of 10 caregivers may report at least 1 sleep problem. Short sleep duration, nocturnal awakenings, wakefulness after sleep onset, and daytime dysfunction seem to be the areas most affected irrespective of stage or type of disease, yet circadian activity remains understudied. In addition, despite a wide spectrum of potential sleep-impairing factors, underlying causal pathways are yet to be explored.Implications For PracticeMore longitudinal, mixed-methods, and comparison studies are warranted to explore caregiver sleep disorders in relation to the gravity of the caregiving situation in the context of diverse types of cancer and disease severity.

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