Study raises hope: New blood test method detects dementia up to 15 years earlier. More than 55 million people worldwide suffer from dementia, a number that is expected to rise to 78 million by 2030.
About 70 percent of all dementia cases are caused by Alzheimer's disease, with vascular dementia, caused by damage to blood vessels, accounting for 20 percent of cases. At the end of 2021, according to the German Alzheimer Society, Germany recorded almost 1.8 million people suffering from dementia. In the same year, around 440,000 people aged 65 and older developed dementia.