Thank you for posting this. I think there is too little distinction between childhood trauma and PTSD on this forum, and I think the distinction is VERY important.
We'll agree to disagree on that one then. Whilst the study is interesting, people skip over the relevant words and facts, often concluding something that isn't...
"loci to a much larger proportion in the childhood abuse (69%) vs. the non-child abuse-only group (34%)."
The above single portion already claims a genome change in non-abuse children, with a larger one in abused.
A single study doesn't achieve anything yet, nor define this as fact. They simply could have stumbled upon a mix of participants who happened to back the numbers... again, even non-abused had a genome change.
It doesn't actually validate any such theory at this point, yet is an interesting course of study to see what further data accumulates from further studies. Will they validate this, or contradict it? Time will tell.
People need to stop drawing conclusions from a single study, instead using a meta-analysis to draw such conclusions which provide a more robust outcome and likelihood of fact.
This is still no different from much more important answers science lacks at this stage, being why does one child abused get PTSD, yet another doesn't? They still don't have the answer to that... just theories, however; you posit this study about genome as relevant for a distinction. I think not at this stage. Interesting.... absolutely. Substantial, factual, actual? No...