Psychiatrymiddle twist
A 19-year-old university student is in the emergency department six hours after her flatmate found her drowsy on the bathroom floor beside an empty blister pack of her mother's temazepam. She is now alert, physiologically well and medically cleared. She answers every question with "I'm fine, it was a mistake", will not say how many tablets she took or why, denies wanting to die, and asks to leave because she has an examination tomorrow. Her flatmate is in the waiting room. Which one of the following will contribute most to the immediate risk assessment?