Insomnia symptoms are common among old people, and hypnotics and sedative drugs are often prescribed in spite of small benefits. The aim of this study was to estimate the prevalence of insomnia symptoms and to analyze the association between insomnia symptoms, cognitive level, and prescription of hypnotics and sedatives among old people living in nursing homes.

The study comprised 2,135 people living in nursing homes in the county of Västerbotten, Sweden. Data concerning hypnotic and sedative drugs, cognitive function, and prevalence of insomnia symptoms were collected, using the Multi-Dimensional Dementia Assessment Scale (MDDAS).

The three most common insomnia symptoms were “sleeps for long periods during the day,” “interrupted night-time sleep,” and “wakes up early in the morning” with 57.8%, 56.4%, and 48.0%, respectively, of the residents exhibiting the symptoms at least once a week. Different insomnia symptoms showed different association patterns with sex and age. Most insomnia symptoms were more common among people with cognitive impairment compared to those with no cognitive impairment and seemed to reach their peak prevalence in people with moderate to severe cognitive impairment, subsequently decreasing with further cognitive decline. Of the study population, 24.0% were prescribed hypnotics and sedatives. Prescriptions were more common among those without cognitive impairment, and among those exhibiting the symptom “difficulty initiating sleep.”

Insomnia symptoms and prescription of hypnotics and sedatives are common among old people living in nursing homes. Considering the risk of adverse effects, it is important to regularly re-evaluate the need for these drugs.

Insomnia increases in prevalence with age, is strongly associated with depression, and has been identified as a risk factor for suicide in several studies. The aim of this study was to determine whether insomnia severity varies between those who have attempted suicide (n = 72), those who only contemplate suicide (n = 28), and those who are depressed but have no suicidal ideation or attempt history (n = 35).

Participants were middle-aged and older adults (age 44–87, M = 66 years) with depression. Insomnia severity was measured as the sum of the early, middle, and late insomnia items from the Hamilton Rating Scale for Depression. General linear models examined relations between group status as the independent variable and insomnia severity as the dependent variable.

The suicide attempt group suffered from more severe insomnia than the suicidal ideation and non-suicidal depressed groups (p < 0.05). Differences remained after adjusting for potential confounders including demographics, cognitive ability, alcohol dependence in the past month, severity of depressed mood, anxiety, and physical health burden. Moreover, greater insomnia severity in the suicide attempt group could not be explained by interpersonal difficulties, executive functioning, benzodiazepine use, or by the presence of post-traumatic stress disorder.

Our results suggest that insomnia may be more strongly associated with suicidal behavior than with the presence of suicidal thoughts alone. Accordingly, insomnia is a potential treatment target for reducing suicide risk in middle-aged and older adults.