The study revealed that elderly people who are hospitalized for serious infections face a significantly higher risk of developing dementia later in life, with the likelihood of developing the condition increasing threefold.
It turns out that hospital admissions of older adults due to illnesses such as sepsis, urinary tract infections, pneumonia, and soft tissue infections increase their likelihood of developing infections that contribute to the development of dementia.
The results of an analysis of 16 studies involving more than 4 million adults over the age of 65 showed that hospitalization due to a range of infections increases the risk of developing dementia later in life by 83%. These patients also had a 60% increased likelihood of developing Alzheimer's disease and a 268% increased risk of vascular dementia—approximately 3.68 times higher.
Sepsis was the most dangerous type of infection, increasing the risk of developing any type of dementia by nearly 80% over a period of two to 25 years. This was followed by pneumonia, which increased the risk of all types of dementia by about 70%.
Urinary tract infections increase the risk of dementia by 57%, while the risk rises to 42% with soft tissue infections.
The study showed that vascular dementia poses a greater risk than Alzheimer's disease over a 25-year period. Unlike Alzheimer's, which primarily affects memory, vascular dementia often leads to a stroke or impaired blood flow to the brain, causing damage to brain cells.
The symptoms of vascular dementia differ from Alzheimer's, as the early signs of vascular dementia include "slowing of thinking, difficulty concentrating, problems organizing thoughts or actions, and memory problems."
The researchers explained that the infection can weaken the blood-brain barrier, allowing pathogens to enter the nervous system and cause widespread inflammation that leads to brain damage. The infection can also cross the intestinal barrier into the bloodstream and then to the brain, causing chronic, low-grade inflammation that destroys brain cells.
The team noted that the risk of developing dementia peaks shortly after infection and may persist for years.
The researchers explained that the study faced some limitations, most notably the inability to measure the severity of the infection or the length of hospital stay, and the variation in follow-up periods for participants between studies, which prevented accurate short-term risk assessment.
However, long-term studies have shown a stronger association between severe infection and dementia.
The researchers called on doctors and nursing teams to exercise extreme caution with elderly people admitted to the hospital due to rapidly developing acute infections, stressing that early intervention "may help mitigate the risk of developing Alzheimer's disease and vascular dementia."
The study, published in the journal Aging, is the first to link hospital-treated infections with an increased risk of dementia.
The study revealed that elderly people who are hospitalized for serious infections face a significantly higher risk of developing dementia later in life, with the likelihood of developing the condition increasing threefold.
It turns out that hospital admissions of older adults due to illnesses such as sepsis, urinary tract infections, pneumonia, and soft tissue infections increase their likelihood of developing infections that contribute to the development of dementia.
The results of an analysis of 16 studies involving more than 4 million adults over the age of 65 showed that hospitalization due to a range of infections increases the risk of developing dementia later in life by 83%. These patients also had a 60% increased likelihood of developing Alzheimer's disease and a 268% increased risk of vascular dementia—approximately 3.68 times higher.
Sepsis was the most dangerous type of infection, increasing the risk of developing any type of dementia by nearly 80% over a period of two to 25 years. This was followed by pneumonia, which increased the risk of all types of dementia by about 70%.
Urinary tract infections increase the risk of dementia by 57%, while the risk rises to 42% with soft tissue infections.
The study showed that vascular dementia poses a greater risk than Alzheimer's disease over a 25-year period. Unlike Alzheimer's, which primarily affects memory, vascular dementia often leads to a stroke or impaired blood flow to the brain, causing damage to brain cells.
The symptoms of vascular dementia differ from Alzheimer's, as the early signs of vascular dementia include "slowing of thinking, difficulty concentrating, problems organizing thoughts or actions, and memory problems."
The researchers explained that the infection can weaken the blood-brain barrier, allowing pathogens to enter the nervous system and cause widespread inflammation that leads to brain damage. The infection can also cross the intestinal barrier into the bloodstream and then to the brain, causing chronic, low-grade inflammation that destroys brain cells.
The team noted that the risk of developing dementia peaks shortly after infection and may persist for years.
The researchers explained that the study faced some limitations, most notably the inability to measure the severity of the infection or the length of hospital stay, and the variation in follow-up periods for participants between studies, which prevented accurate short-term risk assessment.
However, long-term studies have shown a stronger association between severe infection and dementia.
The researchers called on doctors and nursing teams to exercise extreme caution with elderly people admitted to the hospital due to rapidly developing acute infections, stressing that early intervention "may help mitigate the risk of developing Alzheimer's disease and vascular dementia."
The study, published in the journal Aging, is the first to link hospital-treated infections with an increased risk of dementia.
