9/11 and PTSD Rates

September 11 Memorial Pool, New York City

Sir Francis Canker Photography / Getty Images

Many people were greatly affected by the September 11, 2001, terrorist attacks on the World Trade Center and the Pentagon, and as a result of these attacks, many people have wondered if there is a relationship between 9/11 and PTSD.

On 9/11, the United States was faced with one of its greatest tragedies. Many people were directly exposed to this massive traumatic event. Others were indirectly exposed through the extensive television coverage and/or stories from survivors of the attacks. As a result of this, many people were put at risk for the development of PTSD.

Rates of PTSD After 9/11

Several studies have been published that examined rates of PTSD as a result of the 9/11 terrorist attacks.

One study of 2,733 people across the United States conducted in October and November of 2001 found that 11.2% of New York City residents had PTSD, and 4% of U.S. residents had PTSD.

Another study of 998 adults in New York City five to eight weeks after the attacks found that 7.5% had PTSD.

How Distance Made a Difference

As would be expected, people who were in closer proximity to the attacks have been found to have higher rates of PTSD. In particular, 20% of people who lived below Canal Street in New York City (which is close to the World Trade Center) were found to have PTSD following the attacks.

Rates of PTSD in Relief Workers

Another study looked at 109 mental health relief workers who went to Ground Zero for one week during the first 2 months after the 9/11 attacks. This study found that relief workers showed signs of PTSD as a result of direct and indirect exposure to traumatic events at Ground Zero.

Specifically, it was found that 4.6% of relief workers had PTSD as a result of hearing stories from survivors of the attacks. A slightly higher percentage (6.4%) had PTSD as a result of direct exposure to stressors at Ground Zero. However, it is important to point out that 6 to 8 months following the attacks, none of the relief workers were found to have PTSD.

Long-Term Impact of 9/11

Despite the high rates of PTSD immediately following the 9/11 attacks, studies are showing that many people are resilient, no longer having PTSD symptoms as soon as 6 months after the event.

However, if you have been exposed to a traumatic event and find that you are continuing to experience PTSD symptoms or other psychological difficulties (for example, depression), it is very important for you to seek help.

The Anxiety Disorder Association of America provides links to therapists across the United States who specialize in the treatment of anxiety disorders and PTSD specifically. Lists of anxiety disorder support groups being offered across the United States are also provided.

The National Center for PTSD also offers resources and help to locate mental help services near you.

4 Sources
Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Schlenger WE, Caddell JM, Ebert L, et al. Psychological reactions to terrorist attacks: findings from the National Study of Americans' Reactions to September 11JAMA. 2002;288(5):581–588. doi:10.1001/jama.288.5.581

  2. Galea S, Ahern J, Resnick H, et al. Psychological sequelae of the September 11 terrorist attacks in New York CityN Engl J Med. 2002;346(13):982–987. doi:10.1056/NEJMsa013404

  3. Zimering R, Gulliver SB, Knight J, Munroe J, Keane TM. Posttraumatic stress disorder in disaster relief workers following direct and indirect trauma exposure to Ground ZeroJ Trauma Stress. 2006;19(4):553–557. doi:10.1002/jts.20143

  4. Galea S, Vlahov D, Resnick H, et al. Trends of probable post-traumatic stress disorder in New York City after the September 11 terrorist attacksAm J Epidemiol. 2003;158(6):514–524. doi:10.1093/aje/kwg187

By Matthew Tull, PhD
Matthew Tull, PhD is a professor of psychology at the University of Toledo, specializing in post-traumatic stress disorder.