Which of the following is NOT a component of the C-SSRS?

The correct answer is that "Previous therapy effectiveness" is not a component of the Columbia – Suicide Severity Rating Scale (C-SSRS). The C-SSRS is specifically designed to assess the presence and intensity of suicidal ideation and behavior, as well as assess risk levels related to these thoughts and actions.

The components of the C-SSRS include "Suicidal behavior," which refers to any actual or attempted act of self-harm; "Planning level," which assesses the specifics of how much thought the individual has given to their plan for suicide; and "Suicidal ideation," which involves the thoughts surrounding self-harm or suicide. Each of these components helps clinicians gauge the severity of suicidality in an individual and is critical in determining appropriate interventions.

In contrast, the effectiveness of previous therapy is not directly assessed by the C-SSRS; instead, it focuses on current suicidality rather than past therapeutic outcomes. Therefore, it stands out as the component that does not align with the purpose and structure of the C-SSRS.