The C-SSRS Screener records the highest past-month suicidal-ideation level and suicidal behaviour over the lifetime and past 3 months.

Ideation level	Definition
0	No suicidal ideation
1	Wish to be dead
2	Non-specific active suicidal thoughts
3	Active suicidal ideation with a method, without intent or a specific plan
4	Active suicidal ideation with some intent, without a specific plan
5	Active suicidal ideation with a specific plan and intent

Implemented risk state	Criteria
High	Ideation level 4 or 5 in the past month, or suicidal behaviour in the past 3 months
Moderate	Ideation level 3, or lifetime suicidal behaviour with no behaviour in the past 3 months
Low	Ideation level 1 or 2 with no suicidal behaviour
No identified risk	No suicidal ideation and no suicidal behaviour

Columbia Suicide Severity Rating Scale (C-SSRS) Screener