Evidence that Word Trade Center (WTC) responders during 9/11 and its aftermath have since suffered poorer brain health than others not exposed to WTC toxins has mounted in recent years. A new study led by Stony Brook University researchers that evaluates more than 5,000 WTC responders indicates that those who had more exposures to WTC-related toxins have dementia at a higher rate than other responders with fewer WTC-related toxic exposures. Published in JAMA Network Open, the study evaluated patients from the Stony Brook WTC Health and Wellness Program for signs of dementia. The study lasted more than eight years, from November 2014 to January 2023. The average age of the participants at the start of the study was only 53 years old.