Clinical meaning
Suicide risk assessment is a core NP competency requiring understanding of both neurobiological underpinnings and validated assessment frameworks. Neurobiologically, suicidal behavior is associated with: (1) Serotonergic dysfunction — reduced serotonin metabolite (5-HIAA) in CSF of suicide attempters; low serotonin is associated with impulsivity and aggression rather than depression per se (explaining why not all depressed patients are suicidal). (2) HPA axis dysregulation — chronically elevated cortisol from stress sensitization impairs prefrontal cortex executive function, reducing the ability to generate alternatives to suicide. (3) Neuroinflammation — elevated pro-inflammatory cytokines (IL-6, TNF-alpha) are found in suicidal patients; inflammation may impair serotonin synthesis via tryptophan-kynurenine pathway shunting. The Columbia Suicide Severity Rating Scale (C-SSRS) is a structured interview that categorizes suicidal ideation on a 5-point scale: (1) Wish to be dead, (2) Non-specific active suicidal thoughts ('I want to kill myself' without method), (3) Active suicidal ideation with any methods (not a specific plan), (4) Active suicidal ideation with some intent to act (without specific plan), (5) Active suicidal ideation with specific plan and intent. It also separately categorizes suicidal BEHAVIOR: actual attempt, interrupted attempt, aborted/self-interrupted attempt, preparatory acts, and non-suicidal self-injurious behavior. The Safety Planning Intervention (SPI — Stanley-Brown) is a brief, collaborative, prioritized list of coping strategies and resources for managing suicidal crises: Step 1 — Warning signs (recognizing the crisis is building), Step 2 — Internal coping strategies (things I can do alone), Step 3 — People and social settings that provide distraction, Step 4 — People I can ask for help, Step 5 — Professionals and agencies I can contact (988 Suicide & Crisis Lifeline), Step 6 — Making the environment safe (lethal means restriction).