Dementia with Lewy bodies can start as early as 50, but in the vast majority of cases it manifests after 70 years;
It affects 15 to 20% of patients with neurocognitive disorders (about 22% are over 85);
In France, 250,000 patients are affected by Lewy body disease. This is less than Alzheimer’s disease (1 million patients in France); that's as much as Parkinson’s disease (250,000 patients in France), and more than multiple sclerosis (120,000 patients in France).