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Post-traumatic stress disorder has reached staggering levels in the American military. An estimated 7 percent to 20 percent of all service members and veterans who have served in the wars in Afghanistan and Iraq may have the disorder, and rising percentages of veterans from earlier conflicts are also afflicted.
The Departments of Defense and of Veterans Affairs have poured billions of dollars into treating the debilitating condition. Yet neither department really knows whether the treatments offered and applied are effective,according to a report issued Friday by the Institute of Medicine, a unit of the National Academy of Sciences, which had been asked by Congress to evaluate the programs.