Description
The Columbia Protocol, also known as the Columbia-Suicide Severity Rating Scale (C-SSRS), supports suicide risk assessment through a series of simple, plain-language questions that anyone can ask. The answers help users identify whether someone is at risk for suicide, assess the severity and immediacy of that risk, and gauge the level of support that the person needs.
The C-SSRS - Full Scale, Clinician-administered, Lifetime-Recent is a clinician-administered instrument that assesses full and recent history of suicidal ideation and behavior.

References
http://cssrs.columbia.edu/the-columbia-scale-c-ssrs/about-the-scale/

Downloads

C-SSRS-Full-Recent+Lifetime.pdf