Sleep Disturbances In Older Adults Research Articles

Troubles du sommeil chez les aidants à domicile de patients atteints de démence

Estimates suggest that there are more than 700,000 adult caregivers of persons with dementia in this country, a large number of whom experience some form of sleep disturbance during the course of their caregiving career. Health care professionals are in the best position to detect and address this significant public health problem. Prospective study of sleep with the main caregivers providing home-care for demented patients. This study was performed on elderly persons living at home. Two populations were concerned. The control group concerned 86 old persons living in the area of Limoges (France) and was contacted to join by the senior clubs of this city. The other group concerned caregivers to persons with dementia, living with them at home, and the assessments were done during the patient assessment. Each group had a cognitive evaluation by a Folstein's test and answered a questionnaire to describe their possible sleep difficulties. Sixty-eight caregivers face sleep disturbance versus 25 non-caregiver controls. Caregiver sleep-problems are often linked to sleep disturbances in the care-recipient. Night-time awakenings by persons with dementia are a common precipitating cause of sleep/wake disturbances in vulnerable caregivers. Caregivers awake 2.3 times during the night versus 1.2 for control persons. Caregivers awake earlier (around 6:20) than non-caregivers (around 7:05) and their sleep time is shorter by one hour. Caregivers are more often depressed (28 in 98 versus 13 in 86) and have more often high blood pressure (56 in 98 versus 24 in 86). They received more medications and used more often self-medication. Three major contributors to caregiver sleep-disturbance are pointed in this paper: the apparition of caregiver disrupted sleep routines, caregiver burden and depression and the caregiver's physical health status. Successful treatment of a caregiver's sleep disturbance requires careful consideration of each of these contributors. Non-pharmacological options are generally recommended as a first line of treatment for managing sleep disturbances in older adults, including caregivers of persons with dementia.

Sleep disturbances in older adults with mild cognitive impairment

Normal aging and dementia are characterized by increased prevalence of sleep disorders and alterations of both sleep continuity and architecture. However, little is still known about the nature of sleep in mild cognitive impairment (MCI), which is presumably situated on the continuum from healthy aging to dementia. This unsystematic review summarizes the current literature on the prevalence and severity of sleep disturbances in MCI. Eighteen studies addressing sleep/night-time disturbances among other neuropsychiatric symptoms in individuals with MCI were identified through a search of databases and an examination of reference lists of selected papers. Fifteen of those studies reported data on prevalence or severity of sleep/night-time disturbances. Results indicated that 14-59% of patients with MCI had sleep disturbances. These disturbances were often identified as one of the four most prevalent neuropsychiatric symptoms of MCI and were considered as clinically significant in some studies. In addition, there was some evidence that the prevalence of sleep disturbances in MCI is intermediate between that of normal aging and dementia. Longitudinal data suggest that sleep problems are associated with both incident MCI and dementia. These findings support the hypothesis that sleep disturbances are one of the core non-cognitive symptoms of MCI. It remains to be known whether sleep problems could help to identify those individuals with MCI who will eventually develop dementia. Studies characterizing sleep more systematically are needed to verify this proposition and to clarify the associations between sleep disturbances and other neuropsychiatric symptoms of MCI.

Healthy older adults' sleep predicts all-cause mortality at 4 to 19 years of follow-up.

Evidence concerning whether sleep disturbances in older adults predict mortality is mixed. However, data are limited to self-reported sleep problems and may be confounded with other comorbidities. We examined whether electroencephalographic (EEG) sleep parameters predicted survival time independently of known predictors of all-cause mortality. A total of 185 healthy older adults, primarily in their 60s through 80s, with no history of mental illness, sleep complaints, or current cognitive impairment, were enrolled in one of eight research protocols between October 1981 and February 1997 that included EEG sleep assessments. At follow-up (mean [SD] = 12.8 [3.7] years after baseline, range = 4.1-19.5), 66 individuals were positively ascertained as deceased and 118 remained alive (total N = 184). Controlling for age, gender, and baseline medical burden, individuals with baseline sleep latencies greater than 30 minutes were at 2.14 times greater risk of death (p =.005, 95% CI = 1.25-3.66). Those with sleep efficiency less than 80% were at 1.93 times greater risk (p =.014, CI = 1.14-3.25). Individuals with rapid eye movement (REM) sleep percentages in the lowest 15% or highest 15% of the total sample's distribution (percentage of REM <16.1 or >25.7) were at 1.71 times greater risk (p =.045, CI = 1.01-2.91). Percentage of slow-wave sleep was associated with time to death at the bivariate level, but not after controlling for potential confounders. Older adults with specific EEG sleep characteristics have an excess risk of dying beyond that associated with age, gender, or medical burden. The findings suggest that interventions to optimize and protect older adults' sleep initiation, continuity, and quality may be warranted.

Assessment and treatment of sleep disturbances in older adults

Sleep disturbances are common in older adults. These disturbances are often secondary to medical illness and/or medication use or are due to specific problems such as sleep disordered breathing, periodic limb movements in sleep and circadian rhythm disturbances. The prevalence of sleep disordered breathing and periodic limb movement in sleep increases with age. The circadian rhythm tends to advance with age, causing older people to awaken early in the morning. Insomnia is often caused by pain associated with medical illness. Insomnia can also be caused by stimulating medications. In institutionalized elderly, sleep becomes even more disturbed and fragmented than in community-dwelling older adults. Accurate assessment and diagnosis is crucial since effective treatment strategies are available for these sleep disturbances. The effect, prevalence and treatment of each of these conditions is reviewed.

Effective treatment of sleep disturbances in older adults

Sleep disturbance is a common and complex clinical problem, particularly in older adults. With advancing age, the normal sleep cycle begins to break down, resulting in a reduction in the deeper stages of sleep and an often profound increase in the fragmentation of nighttime sleep by periods of intrusive wakefulness. Sleep disorders exacerbate these age-related changes, leading to reports of daytime fatigue, sleepiness, and impaired daily function. The resultant chronic sleep deprivation invariably leads to often-unsuccessful attempts by the patient to overcome the problem. Patients may stay in bed longer, take more naps during the day, or seek out agents that putatively restore normal sleep patterns. Paradoxically, these efforts often result in exacerbation of the sleep disturbance. This review delineates the common causes of disordered sleep in older persons. Further, it reviews effective diagnostic approaches and treatments for these conditions, including limitations of hypnotic medications and melatonin.