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Why Do Some Acquire PTSD and Others Not?

11 Sep

Dear Belleruth,

Why do some people experiencing severe traumatic events get posttraumatic stress and others not?  As a psychologist, I have always wondered this. Over the years, I have seen some clients where you would think, based on their history, they surely would have acquired PTS and yet didn’t; and those for whom the reverse is true – you wouldn’t think, from what they say about what they experienced, that they’d have the condition, and yet they do.  How does this happen?

Dr. Nick K.

Dear Nick,
This is something that most therapists ponder at one time or another… because the external event is only one piece of the puzzle.  There are plenty of other factors that come into play.  I discuss this in detail in Invisible Heroes, but the short answer is that we also need to consider these factors: 

  • How sensitive, how easily irritated is the person’s inborn neuronal system?

  • How many previous traumas have they experienced? 

  • How psychologically fragile or resilient is he or she to begin with?

  • Is it, in fact, a he or a she? (Women and children are more likely to acquire PTS than men, from the same event(s)).

  • Was the person inebriated at the time of the traumatic event? Drunkeness turns out to be a bit of an innoculator.

  • Similarly, how well-educated? (also found to be protective to a degree.)

  • How much social support does this person have?

There’s also the differing nature of the traumatic event.  Variables to consider:

  • Proximity – how close was he or she to what was going on?

  • Duration – how long and/or frequent was the exposure?

  • Brutality – events characterized by human ugliness have a greater impact on PTS than even degree of injury

  • Betrayal – ditto.

  • Unpredictability creates more distress and symptoms of PTS than regular abuse you can set your watch by.

  • Being trapped is a very powerful generator of PTS.

Additionally there are strong correlations with tendencies to dissociate during and after the traumatic event.  There are more factors, but these are some of the main ones.  Epidemiology and clinical research reveal more and more every day.  But those are some of the reasons you can’t tell who’s going to get PTS from the catalyzing events alone.  It’s a complicated formula.  The only way you can diagnose PTS is by the combination of symptoms the person is experiencing – not by what happened to them.

I hope this casts a little light on this complicated issue.  Thanks for asking.

All best,
BR

Belleruth Naparstek

Psychotherapist, author and guided imagery pioneer Belleruth Naparstek is the creator of the popular Health Journeys guided imagery audio series. Her latest book on imagery and posttraumatic stress, Invisible Heroes: Survivors of Trauma and How They Heal (Bantam Dell), won the Spirituality & Health Top 50 Books Award