Among patients requiring health care visits (P), how does use of the “Ask Suicide Screening Question” toolkit (I) as compared to not using the “Ask Suicide Screening Question” toolkit (C) affect self-harm behavior and suicide (O) within 3 months of the visit (T)? The target population is home-based patients. The independent variable is the Ask Suicide Screening Question toolkit, while the dependent variables are self-harm behavior and suicide within 3 months of the visit.