Getting a good night’s sleep is sound advice for most people, but a new UBC study says sleep is vital for those who are recovering from a stroke.
Jennifer Davis is an assistant professor in the Faculty of Management at UBC’s Okanagan campus. Her goal is to improve the health of Canadians and her research area includes exploring the value of patient-reported measures in the fields of healthy aging—including cognition, mobility and various surgical outcomes.
Davis, along with a team of UBC researchers, recently published a study in the Journal of Stroke and Cerebrovascular Diseases examining the relationship between depression and sleep among stroke survivors.
“Sleep disturbances are common in older adults who have had a stroke and there is mounting evidence that stroke and sleep are interconnected,” she says. “Because a stroke can damage the central nervous system, it often leads to changes in brain activity, brain function and sleep.”
Davis says one in six older adults, worldwide, will suffer a stroke and data suggests that 20 to 40 per cent of those stroke survivors have a sleep disorder, while a further 50 to 70 per cent will have a sleep-related breathing disorder.
Poor sleep, she says, may significantly interfere with post-stroke recovery and may also lead to depression if a stroke survivor suffers from daytime confusion and inability to cope due to being overtired.
“There is an emerging area of research examining the benefit of sleep in regulating emotional brain reactivity,” she says. “In this study, we found that depression was significantly associated with sleep quality, how long it takes a person to fall asleep, how well they sleep and their daytime dysfunction due to a lack of sleep.”
Davis notes it is common for stroke survivors to experience depression—while they recover, they are also dealing with lower levels of health-related quality of life, physical function and general cognition. Add on a poor night’s sleep and it’s easy to assume that stroke-associated effects on sleep quality can also impact a person’s general, physical and mental wellbeing.
“The specific associations that depression, health-related quality of life, physical function, and cognition have with sleep quality among stroke survivors remains unknown,” Davis says. “Fortunately, sleep quality is modifiable—it’s something we can recognize and work to improve. Thus, sleep should be considered in the management of those who have suffered a stroke to optimize post-stroke rehabilitation outcomes.”