The Columbia-Classification Algorithm for Suicide Assessment (C-CASA) can be used to evaluate a patient for evidence of suicidal thoughts or behavior. The authors are from Columbia University.
Major categories:
(1) suicidal event
(1a) suicidal ideation
(1b) preparatory acts toward imminent suicidal behavior
(1c) suicide attempt
(1d) completed suicide
(2) nonsuicidal event
(2a) self-injurious behavior, no suicidal intent
(2b) other, no deliberate self-harm
(3) indeterminate or potential suicidal event
(3a) self-injurious behavior, suicidal intent unknown
(3b) not enough information
Parameters:
(1) suicidal ideation
(2) preparatory acts
(3) self-injurious behavior (action taken)
(4) death
Suicidal Ideation
Preparatory Act
Self-Injurious Behavior
Death
Term
yes
no
no
no
suicidal ideation
yes
yes
no
no
preparatory acts toward imminent suicidal behavior
yes
yes
yes
no
suicide attempt
yes
yes
yes
yes
completed suicide
no
NA
yes
no
self-injurious behavior, no suicidal intent
no
NA
no
no
other, not deliberate self-harm
unknown
NA
yes
no
self-injurious behavior, suicidal intent unknown
unknown
NA
unknown
no
not enough information
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