Psychiatrymiddle twist
A 31-year-old man is waiting to be seen in a busy emergency department, brought in by his brother, who says he has stopped his medication. He has schizophrenia and says a voice tells him the staff are poisoning him. He spent nine months in gaol at 24 after hitting a stranger outside a hotel. His brother says he has been drinking heavily and smoking ice for the past week. He carries no weapon and is sitting quietly at present. Which one of the following features of his history best predicts that he will behave violently during this admission?