Did PTSD exist in 1361?

Many of the farmers and soldiers that survived the battle at the wall in 1361 surely suffered from mental ill health. But it was only in modern times that the psychological effects of war on soldiers have been brought to light.

Post Traumatic Stress Disorder (PTSD) manifests itself in strong anxiety and stress. PTSD occurs following life-threatening traumatic events and can lead to long-term depression and suicide. In USA, almost one war veteran per hour took their own life in 2012.* (*Sources: US Department of Veterans Affairs, The Huffington Post)

How many of the survivors went mad, committed other acts of violence or took their own lives after the battle of 1361? Were the Gotlanders affected worse than Valdemar’s soldiers?