WEDNESDAY, July 17 (HealthDay News) -- There's no proof that
community-wide screening for dementia results in any emotional,
clinical or economic benefits, new research indicates.
"We found no evidence that population screening would lead to better clinical or psychosocial outcomes, no evidence furthering our understanding of the risks it entails and no indication of its added value compared to current practice," said study author Carol Brayne, a professor of public health medicine from Cambridge Institute of Public Health, in the United Kingdom. She and her colleagues were to present their findings Wednesday at the annual Alzheimer's Association International Conference, in Boston.
For years, there has been wide debate among health advocacy
groups and policymakers over whether or not community-wide
screening for dementia helps patients and saves health care
dollars. Because there is no cure for Alzheimer's, many argue
against the need for it, but as many as 50 percent of people with
dementia go undiagnosed, the authors said.
Given the debate, Brayne said she was surprised by "the extent
of the lack of evidence that supports it [community-wide
For the study, she and colleagues reviewed all of the available
studies on the issue. "We wanted to try to find all the relevant
studies and then assess how well they addressed the specific
question we were asking about screening in populations," said
"Out of all of them, there were only six presenting some information about cost and economic implications; we found none with regards to clinical and psychosocial outcomes, such as cognitive, emotional health, social and planning benefits of population screening," Brayne said.
The team added that significant resources are required to screen
for dementia, and there is no indication that it adds value
compared to current screening practices.
Dr. Murali Doraiswamy, a professor of psychiatry and medicine at
Duke University Medical Center and the author of
The Alzheimer's Action Plan, said, "I think this study is
empowering information in some sense. The general policy is we
don't want to do screening unless two criteria are met: the
screening test has to have a high degree of accuracy; and two, the
results of the screening end up with some kind of an intervention
that improves the outcome for a person."
For the vast number of screening tests, the value is
overstressed, said Doraiswamy. "We're starting to learn as a
country the massive harm people suffer as a result of promoting
screening tests -- from raising anxiety of patients to doing
unnecessary procedures that result in incidental findings," he
The study results don't suggest ignoring troubling symptoms,
Family and friends worried about a loved one should check in
with their doctor, said Dr. Heather Snyder, director of medical and
scientific operations at the Alzheimer's Association. People who
have a parent or sibling with Alzheimer's are at a higher risk,
too, she said.
"If you are concerned about yourself or your loved one's ability to remember things, know the warnings signs of Alzheimer's, speak to your health care provider, or go to www.alz.org if you need help getting connected with a local physician," said Snyder.
She also pointed out that sometimes other health issues -- such
as hormone imbalances, multiple medication use and nutrition
deficiencies -- can cause memory problems, and they are treatable.
"That's why it is important to speak to a health care provider if
you have questions about memory changes," said Snyder.
Brayne said future research might focus on higher-risk groups.
"A research program that tested systematic screening in populations
that are known to be at higher risk could be part of a clearer
strategy to generate the evidence we need to make informed
decisions as a whole society," she noted.
Research presented at meetings should be viewed as preliminary
until published in a peer-reviewed journal.
For more on Alzheimer's, go to the
of Health and Human Services.
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