Thought you might find this infographic of interest. This resource is aimed specifically at the military community, however, causes and effects are applicable to the population in general. Women, adolescent boys, and girls make up 90% of the PTSD population, with veterans making up the other 10% (Bessel van der Kolk, 2010, Kripalu).  This photo is at the end of the infographic. But it does a good job over the causes, the population, and the affects. These are suggestions for treatment.  Of course, in addition to meditation we would add:  trauma-sensitive yoga!