Jin-Tai Yu, M.D., Ph.D., an associate specialist in neurology at the University of California, San Francisco, and colleagues reviewed the findings of 323 studies completed between 1968 and 2014. Collectively, the studies involved more than 5,000 patients and looked at 93 conditions with the potential to affect Alzheimer's risk. The team set out to determine which factors appeared to offer some protection against developing Alzheimer's.
The strongest evidence suggested that:
Patients battling several serious health conditions also seemed to see their risk fall, including those with:
By contrast, a complex statistical analysis enabled the research team to zero in on the nine factors that appeared to elevate Alzheimer's risk among 66 percent of those who ultimately get the disease.
Effective interventions in diet, medications, biochemical exposures, psychological condition, pre-existing disease and lifestyle may decrease new incidence of AD.