Post Traumatic Stress Disorder (PTSD) Assessment View Calculator Post Traumatic Stress Disorder, or PTSD, may develop after a person experiences a very traumatic event. Most people develop PTSD immediately after the event; others, however, develop symptoms several weeks, months, or even years after the event. Common causes of PTSD are military combat, natural disaster, a violent criminal attack, sexual assault, or serious accident. PTSD can occur at any age and some studies indicate that more than 10% of people will suffer from PTSD at some point in their lives. If you have experienced a traumatic event and wonder about the possibility of PTSD, take this quick assessment to learn more about the symptoms of Post Traumatic Stress Disorder (PTSD) and help you determine whether or not you might suffer from PTSD. Learn more about putting this calculator or other calculators on your website.