Again, if you look at only PTSD the diagnosis, then yes, you are correct and I am not disagreeing, that that as a category has to date no proven genetic markers on who gets it and who doesn't, nor is it passed within twin pairs or families.
This is precisely what I am saying, there is no evidence to support that it is a genetic disorder and its proven to be an injury triggered illness - thus my observation that the PTSI group have a point.
Anxiety and depression though... unfortunately you need to do a bit more research and learn about the genetics at play in both... especially considering both comprise a huge chunk of PTSD.
A pure PTSD diagnosis would reflect that anxiety & depression are caused by the trauma and therefore a symptom of PTSD. That is, you can't develop PTSD simply by having anxiety and mood disorder without the Trauma, even if you were genetically predisposed to other mental illnesses. Though, I'm not an expert here, I've done some research and found nothing explicitly showing a statical link between genetics and PTSD.
I believe it to be combination of core beliefs, social psychology and the trauma causing the symptoms. That is, the primary factors are external factors hence the 'injury'.
I actually just found a really good summation from True & Lyons on genetics in correlation to PTSD:
A better question is, What are the relative contributions of genetic and environmental factors, and how do each of these sets of factors operate?
It is particularly interesting to apple this question to PTSD because, by definition, environmental determinants are a necessary factor in its etiology. Indeed, PTSD may be seen as the quintessential environmental determined psychopathology, since it is the only form of mental illness that requires the presence of an environmental risk factor (i.e., a traumatic event) as a criterion for the disorder. However, even when the environmental risk factors that are necessary for development of pathology have been identified, the possibility remains that genetic factors also contribute to liability for developing a disorder.
Good question from the author...
Precisely what I am saying and thus I can see the point of the group looking at PTSI.
The environmental factor is the key in PTSD. We can't rule out a predisposition to other genetic mental illnesses because of the existence of co-morbidities. We can question, however, whether without Trauma, a person fits the criteria of PTSD...whether the reaction to the trauma is less or more can be both dependant on prior mental illnesses as well as the cognition of the individual (the individuals perception of the severity of the trauma) and the speed and appropriateness of treatment. The author of the article presents a theory that genetics doesn't help those who suffer environmental trauma, and can contribute to the onset of symptomatology IF Trauma exists.
If we were able to remove all trauma and those that perpetuate it, then there would be no PTSD, rather anxiety and depression disorders. The medication's that exist for anxiety and depression illnesses are already there, so is that a 'cure' for PTSD ? nope because the cause is still Trauma and cognition which is incurable, only manageable through addressing the anxiety and depression that surround it through medication and awareness (primarily).
I think that it is also worth noting, that I am of the realistic view, that I have no ability to change others, I can only change me. This notion is what makes me fight every day to manage my illness through working on enhancing my own knowledge and awareness of my circumstance, cognition and behaviours. You may place me in the camp of 'cognitive behaviourists' on this one as opposed to the 'abnormal psychology' of the psychoanalytical school of thought if you like - I won't mind that at all in relation to PTSD. In saying this, I recognise that it is a side step from the original thread topic, but thought it worth noting based on the subsequent posts.
I can see the point of the PTSI group, and although it is not moving towards a cure, nor will it remove stigma (any illness of the mind and body will have some level of stigma because of the individual choice factor of stigma). What it does have the potential to do is to clarify the primary cause (and not secondary) - this can highly influence how people frame the illness and behaviour/treatment of sufferers. I welcome all the help we can get in this department...
A logical argument goes two ways, and logically I stand firmly on the fence but objectively appreciating the argument of the PTSI group. The additional debate is quite a perk of this thread though :)
I would encourage all involved/ interested to consider both sides to this, as the cost of change may just be worth it...