I think so, yes... but it is not always abuse related.
It can be any traumatic event.
For me, it's because I was born at 26 weeks, barely survived, spent the majority of my childhood in the hospitals for countless surgeries, etc etc etc.
In my opinion, the stigma that DID cause is childhood abuse has gone too far. Everyone automatically assumes that is the cause... no one ever talks about the other causes.

Some people even believe there are "natural multiples" who came about as a natural part of their development, not as an outcome of abuse or trauma.