Harvard Mental Health Letter

Commentary: A biomarker for PTSD risk?

The story of PTSD is still being written. Sadly, traumatic experiences continue to be intrinsic to human life, even outside the context of war. The continued presence of the U.S. armed services in Afghanistan and Iraq has broadened the sense of urgency about the disorder. Up to 13% of soldiers develop it, while the lifetime prevalence of PTSD in the United States is under 8%.

Since in wartime the experience of trauma is relatively easy to detect, much research has focused on preventing the illness from developing after a trauma occurs. Studies have shown what doesn't work — so-called "debriefing" interventions are not effective and can make matters worse. In fact, as of yet, there is no treatment known to prevent PTSD. So researchers are working to identify risk factors that might predict who is most vulnerable to developing symptoms.

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