| United States | US Neurodegeneration Epidemiology |
| Europe | European Neurodegeneration Epidemiology |
| China | China Neurodegeneration Epidemiology |
| Japan | Japan Neurodegeneration Epidemiology |
| India | India Neurodegeneration Epidemiology |
| Global | Global Neurodegeneration Epidemiology |
| YLL (Years of Life Lost) | premature mortality. High for ALS (rapid death), moderate for AD (late-onset) |
| YLD (Years Lived with Disability) | chronic disability burden. High for AD/PD (long disease course), lower for ALS (short survival) |
| DALY = YLL + YLD | total disease burden |
| Databases | OMIMOrphanetClinicalTrialsPubMed |