Not surprisingly soldiers who have fought in Afghanistan and Iraq often come back with mental health problems. But the true extent of the problem is difficult to measure and there has been little research into what other problems soldiers might have. Scientists from the Walter Reed Army Institute of Research collected anonymous mental-health surveys from 18,305 soldiers between 2004 and 2007. The surveys were collected three and 12 months after deployment. The study found that the prevalence of PTSD ranged from 5.6%-11.3% and that of depression from 5%-8%. Alcohol misuse or aggressive behaviour was present in about half of the people affected by PTSD or depression.
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