Navigation Links
More than 3,000 survivors of the WTC attacks experience long-term post-traumatic stress disorder

January 6, 2010 -- Nearly 10 years after the greatest human-made disaster in U.S. history-- the destruction of the World Trade Center (WTC) towers -- there has been little research documenting the attacks' consequences among those most directly affected -- the survivors who escaped the World Trade Center towers. In a study just released by Columbia University's Mailman School of Public Health, in conjunction with the New York City Department of Health and Mental Hygiene and the federal Agency for Toxic Substances Disease Registry (ATSDR), researchers found that of the 3,271 civilians who evacuated the Twin Towers, 95.6% of survivors reported at least one current posttraumatic stress symptom and 15% screened positive for Posttraumatic Stress Disorder (PTSD), two to three years after the disaster. While past studies have examined PTSD prevalence among rescue and recovery workers, Lower Manhattan residents, other downtown building occupants, and passersby, this is the first study to focus specifically on people who were inside the towers when they were struck. The full study findings are currently online in the American Journal of Epidemiology.

PTSD is a psychiatric disorder that occurs after experiencing or witnessing events that threaten death or serious injury and that involves intense feelings of fear, helplessness, or horror and is the third most common anxiety disorder in the United States. The researchers report that five characteristics of direct exposure to the terrorist attacks were predictors of PTSD: a key driver was initiating evacuation late. Other predictors were being on a high floor in the towers, being caught in the dust cloud that resulted from the tower collapses, personally witnessing horror, and sustaining an injury. Working for an employer that sustained fatalities also increased risk. Each addition of an experience of a direct exposure resulted in a two-fold increase in the risk of PTSD.

The vast majority, 91% of survivors above the impact zone in 2 WTC, reported that they began evacuation after the first plane hit 1WTC. Overall, 60.8% were caught in the dust cloud from the tower collapses. Ninety-four percent witnessed horror, and 32% sustained an injury, ranging from a concussion to a sprain or strain. The overwhelming majority of survivors reported that the WTC was their usual place of work (95.8%).

The researchers found that women and minorities in particular were at an increased risk of PTSD, although the strongest demographic risk factor for PTSD in the study was low income. Survivors with incomes less than $25,000 per year were eight times more likely to have PTSD than those earning more than $100,000 per year.

The study was based on interviews with 3,271 English-speaking, civilian survivors who are enrolled in the WTC Health Registry, the largest post-disaster public health registry in U.S. history, tracking the health of more than 71,000 people directly exposed to the WTC disaster. Eligibility criteria for this particular study included a minimum age of 18 years, physical presence in either Tower 1 or 2 between the first plane impact and subsequent tower collapses, and no participation in WTC rescue/recovery activities.

In terms of other demographic characteristics of this cohort of survivors, 58.5% were men and 68.2% were white. However, the risk of PTSD was highest among Hispanics and African Americans. Sixty-seven percent of the survivors were college graduates and 60% had an annual household income greater than $75,000. Sixty-seven percent worked for an employer that sustained fatalities on 9/11.

Because this study targeted those with the greatest direct exposure, the burden of posttraumatic stress was higher for these survivors than that documented in previous 9/ 11 studies, and the number of cases of posttraumatic stress observed was directly related to the number of direct exposures reported.

"PTSD risk was greater among survivors who experienced serious life threat as defined by location in the towers, time of evacuation initiation, or dust cloud exposures," said Dr. Laura DiGrande, DrPH, MPH, Columbia's Mailman School of Public Health doctoral degree recipient for this research and first author of the study. "As one would expect, individuals who were exposed to several of the most troubling and life threatening events during the disaster were at the greatest risk of PTSD." Only 145 or four percent of survivors had no symptoms of PTSD.

"As the long-term effects of the WTC disaster emerge the results from this study suggest that some survivors of the WTC disaster will continue to report psychological symptoms years after their exposure to the events of 9/11. The implication of this finding is that the impact of terrorism on survivors, particularly those in low socioeconomic positions, could be substantial, as PTSD is known to be co-morbid with other disorders and harmful behaviors that affect daily functioning, wellness, and relationships," noted Dr. Sandro Galea, MD, chair of the Department of Epidemiology at Columbia's Mailman School of Public Health and study senior author.

"As disaster literature moves toward understanding long-term risks in the general population, this study reminds us that the relation between direct exposures and PTSD is clear and suggests potential avenues for planning policy to reduce the burden of terrorism-related psychopathology," noted Dr. Robert Brackbill, PhD, MPH, the Registry's founding principal investigator and study coauthor.

As the 10-year anniversary of the World Trade Center disaster approaches, Columbia researchers and the WTC Health Registry are continuing to ascertain even longer term implications.


Contact: Stephanie Berger
Columbia University's Mailman School of Public Health

Related medicine news :

1. Angel MedFlight Worldwide Air Ambulance offers $3,000 scholarship for a student pursuing a career in aviation at an Arizona school
2. Israel Penn Registry marks 3,000 consults for transplant care providers
3. Cancer and Multiple Sclerosis Survivor Martin Smith's 3,000-mile Bicycle Ride Benefits Cancer Research
4. Skin Cancer Education Provided by 3,000 Dermatologists for Skin Cancer Awareness Month
5. With Record Registration of 13,000 Runners to Date, the 2010 Dicks Sporting Goods Pittsburgh Marathon Announces a Cap of 16,000
6. Weightlifting does not appear to increase risk of arm swelling for breast cancer survivors
7. Older survivors of mechanical ventilation can expect significant disability
8. Researchers expand cyberspace to fight chronic condition in breast cancer survivors
9. Breast cancer survivors often rate post-treatment breast appearance only fair
10. Childhood Cancer Survivors Risk Future GI Problems
11. Childhood cancer survivors face long-term risk of GI complications, study finds
Post Your Comments:
(Date:11/25/2015)... Canadian, OK (PRWEB) , ... November 25, 2015 , ... ... and International training center for the Narconon network, announced the release of a new ... Since 1966 the Narconon organization has been working with drug- and alcohol-addicted individuals with ...
(Date:11/25/2015)... ... November 25, 2015 , ... On November 23rd 2015 ... Tri Lite’s personal heating products business. Cozy Products explains what this means for ... fit in well with the Cozy Products business model: to sell personal heaters that ...
(Date:11/25/2015)... Calif. (PRWEB) , ... November 25, 2015 , ... Beddit® ... and Beddit Classic sleep tracking systems. The new app features a more intuitive SleepScore™ ... and understand how well you slept. The SleepScore is created by a proprietary algorithm. ...
(Date:11/25/2015)... , ... November 25, 2015 , ... “While riding the ... inventor, from Bronx, N.Y. “I thought there had to be a convenient and comfortable ... PROTECTOR. , The PROTECTOR enables disabled individuals to safely travel during cold or inclement ...
(Date:11/25/2015)... ... November 25, 2015 , ... ... announces the nation’s Periwinkle Pioneers, individuals and groups responsible for advancing care for ... The Periwinkle Pioneers, nominated by the public, will receive special recognition throughout 2016 ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... , Nov. 26, 2015 Research and ... of the "2016 Future Horizons and Growth ... Market: Supplier Shares, Country Segment Forecasts, Competitive Intelligence, ... --> --> ... of the Japanese therapeutic drug monitoring market, including ...
(Date:11/26/2015)... November 26, 2015 ... addition of the  "2016 Future Horizons ... Cell Surface Testing Market: Supplier Shares, ... their offering.  --> ... the  "2016 Future Horizons and Growth ...
(Date:11/26/2015)... --> ... att använda SyMRI för att hitta optimal ... med multipel skleros (MS) eller hjärntumörmetastaser och ... för att kunna använda SyMRI Research Edition ... kan man generera flera konstrastbilder från en ...
Breaking Medicine Technology: