Risk Factors for Post-Traumatic Stress Disorder The following description of risk factors also answers QID:919472837474 The best answer would be d) her intelligence quotient. The patient has developed symptoms of post-traumatic stress disorder, including the most specific “intrusive symptoms.” These have occurred after the life-threatening event she went through. Both the international classification of diseases and the diagnostic and statistical manual require such a precipitating factor for making the diagnosis. It is an event that is life-threatening, or according to the diagnostic and statistical manual, one that threatens body-integrity (e.g. rape). One may either be a bystander or directly threatened by the event. However, this factor interacts with other predisposing or vulnerability factors in an individual to trigger the condition. Genetic factors account for about one-third of the vulnerability , according to a study conducted on twins working in the U.S. military. Other no