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• 19 Nov

Share on Twitter In a study that included nearly 24,000 participants, those who experienced a stroke had an acute decline in cognitive function and also accelerated and persistent cognitive decline over 6 years, according to an article in the July 7 issue of JAMA.Each year, approximately 795,000 U.S. residents experience a stroke. In 2010, almost 7 million adults were stroke survivors. Cognitive decline is a major cause of disability in stroke survivors. The magnitude of survivors’ cognitive changes after stroke has been uncertain, according to background information in the article.Deborah A. Levine, M.D., M.P.H., of the University of Michigan Medical School and Ann Arbor VA Health System, and colleagues examined the changes in cognitive function among survivors of incident stroke, controlling for their pre-stroke cognitive trajectories. The study included 23,572 U.S. participants 45 years or older without cognitive impairment at study entry (2003-2007), and followed up through March 2013. Over a median follow-up of 6.1 years, 515 participants (306 white, 209 black) survived incident stroke and 23,057 remained stroke free. Participants are in the Reasons for Geographic and Racial Differences in Stroke (REGARDS) study. Share Pinterest LinkedIn Share on Facebook Email The researchers found that stroke survivors had a significantly faster rate of incident cognitive impairment after stroke compared with the pre-stroke rate, controlling for the odds of developing cognitive impairment before or acutely after the event. Incident stroke was associated with accelerated and persistent declines in global cognition and executive function (cognitive process that regulates an individual’s ability to organize thoughts and activities, prioritize tasks, manage time and make decisions), after accounting for individuals’ cognitive changes before and acutely after the event. In addition, there were significant, acute declines in new learning and verbal memory after stroke but no acceleration of pre-stroke rates of change in these functions.“Our study has potential implications for clinical practice, research, and health care policy. Although clinical practice guidelines and quality improvement programs recommend cognitive assessments be performed for patients with stroke before hospital discharge and also in the postacute settings, our results suggest that stroke survivors also warrant monitoring for mounting cognitive impairment over the years after the event,” the authors write.“Moreover, our results suggest that long-term cognitive dysfunction is a potential domain for evaluating acute stroke therapies. As adults increasingly survive stroke, cases of post-stroke cognitive impairment will multiply. Given that post-stroke cognitive impairment increases mortality, morbidity, and health care costs, health systems and payers will need to develop cost-effective systems of care that will best manage the long-term needs and cognitive problems of this increasing and vulnerable stroke survivor population.”