Summary: The authors analyzed self-report questionnaire data from over 900 former NFL players (ages 50+). Their results revealed higher prevalence of self-reported MCI and dementia compared to the general population, with self-reported impairment associated with various health-related (reported concussions, depression, anxiety, recent pain, sleep apnea) and demographics-related (age, race) factors.
https://pubmed.ncbi.nlm.nih.gov/34593716/
Walton, S. R., Brett, B. L., Chandran, A., DeFreese, J. D., Mannix, R., Echemendia, R. J., Meehan, W. P., McCrea, M., Guskiewicz, K. M., & Kerr, Z. Y. (2021). Mild cognitive impairment and dementia reported by former professional football players over 50 years of age: an NFL-LONG study. Medicine & Science in Sports & Exercise. doi: 10.1249/MSS.0000000000002802