The chronic health burdens experienced by World Trade Center first responders, including posttraumatic stress disorder (PTSD), are compounded by environmental exposures in neighborhoods where they live years later, according to a study published today in Nature Communications.Why It’s Relevant
Police, firefighters, and other emergency personnel who responded to the terrorist attack on the World Trade Center on September 11, 2001, still experience significant health consequences, including greater rates of PTSD, depression, and frailty. Research increasingly shows that some of these chronic conditions are also influenced by environmental exposures, including air pollution, high temperatures, and proximity to green space.
By the Numbers
- Researchers analyzed data from 18,734 first responders (82% male) living in New York City who were interviewed multiple times between 2003 and 2023. Approximately 39% and 35% met the criteria for PTSD and depression, respectively, at some point.
- Greater exposure to air pollution and higher temperatures was associated with increased risks of frailty, depression, and PTSD, while living within 300 meters of green spaces was associated with a significant decrease in those risks.
- Average neighborhood temperature was the dominant environmental factor contributing to frailty and PTSD risk, though not depression.
- The effects were greater, though not statistically significant, among first responders with more intense World Trade Center experiences, such as those who arrived onsite within the first three days and those who witnessed horrific scenes.
The Other Side
Green space proximity was measured using 2020 street view imagery, which does not capture changes in green space over time. Additionally, though the researchers adjusted for many individual and neighborhood-level sociodemographic factors, unmeasured factors—such as responders’ job exposure to smoke or other pollutants over time—may have played a role in the findings.
Takeaway Message
“Our findings suggest that the health consequences of 9/11 may not end with the disaster itself,” study author Maayan Yitshak-Sade, M.P.H., Ph.D., said in a news release. “For responders already carrying the biological effects of trauma and toxic exposures, everyday environmental conditions may represent an additional source of stress on the body and mind. These findings highlight the importance of considering where people live, not just what they experienced during the disaster.”
Related Information
Source
Helena Krasnov, et. al. Urban exposures, frailty, and mental illness in World Trade Center health program responders. Nature Communications. Published September 11, 2026. doi: 10.1038/s41467-026-77401-7
(Image: Getty Images/iStock/impactimage)
