According to recent estimates, 3.6 percent of the adult population in the United States have experienced post-traumatic stress disorder (PTSD) in the past year, while almost 7 percent have had the condition at some point in their lives.
Although almost half of all U.S. adults experience at least one traumatic event during their lifetime, not all of them develop PTSD symptoms, which include frightening flashbacks of the traumatic event, sleep problems, and difficulty fighting off fear.
