Wow, I actually think about this somewhat regularly.
I remember disassociating as far back as three years old.
I started group therapy when I was in first or second grade and had an outside counsellor from middle school through graduation. My first trip to the hospital was when I was nineteen. Between middle school and 19 I had at least two sudo diagnoses, as you cannot properly diagnose a child. My first two were passive aggressive and antisocial. I got a diagnosis of severe depression when in hospital for first time.
I am hoping that I have broken the cycle of abuse and trauma. I also know that the boundaries I have put in place have been extremely helpful in reducing my stress levels; therefore reducing depression and anxiety, as well as any potentially more severe symptoms like delusions or hallucinations.