Assessing suicidal thoughts means understanding the person's current distress, thoughts, behaviour, circumstances and immediate needs, then agreeing an appropriate safety and follow-up plan. A positive PHQ-9 item 9 or a structured screening response should prompt further assessment, not an automatic risk category or a predetermined discharge decision.
This guide applies to professional learning in primary care and MRCPsych CASC preparation. The worked encounter is fictional. It draws on NICE NG225, NHS England's Staying Safe from Suicide guidance and the Columbia Scale's description of its purpose, reviewed on 27 September 2026. NICE NG225 specifically concerns self-harm; its scope should not be silently relabelled as a complete guideline for every presentation involving suicidal thoughts.
What a positive PHQ-9 item 9 does and does not establish
PHQ-9 item 9 asks about thoughts of death or self-harm during its specified recent timeframe. A positive answer does not by itself distinguish a wish not to wake up, active suicidal thoughts, intent, a specific plan or behaviour. Those distinctions require sensitive follow-up. The overall depression score is not a substitute for that conversation.
A negative screening response also does not erase relevant clinical information. A person may disclose concern later, understand the wording differently or present with behaviour or circumstances that require further assessment. Do not treat a screening form as permission to ignore distress, collateral information or a change during the consultation.
The useful question is not "Which category has this score put the person in?" It is "What does this answer mean for this person, now?" A screening result should help open the discussion, not close it. The broader relational approach is consistent with NHS England's suicide-safety guidance, checked on 27 September 2026.
Start with current distress and immediate needs
Ask what has changed, what feels hardest and what the person hoped would happen by seeking help. Use direct, non-judgemental language. Acknowledging the disclosure can help: "Thank you for telling me. I would like to understand what these thoughts have been like and what support you need now."
At the same time, recognise urgent physical or mental-health needs. A person with injury, poisoning, severe intoxication, acute confusion or another immediate medical problem needs the appropriate emergency response. An educational rule that always prioritises a long psychosocial interview over stabilisation would be unsafe.
Establish whether the person feels able to remain engaged with the current assessment and what help is available nearby. Do not equate appearing calm with being safe, or visible distress with a specific future outcome. Describe what is observed and ask what it means to the person.
Explore thoughts, intent, behaviour and context
Clarify the nature, recency, frequency and change in thoughts. Ask about intent and any actions taken, including previous episodes, without turning the assessment into a graphic exploration of methods. Establish access to things the person is concerned they may use to harm themselves where relevant to collaborative safety planning.
Ask what has prevented action, who the person can contact, what matters to them and what support has been useful before. These are not protective points to subtract mechanically from a tally of concerns. A relationship may be supportive but unavailable tonight; employment may be valued while also being a source of acute distress.
Explore mental and physical health, substance use, recent losses, interpersonal events, practical pressures and treatment changes. Clarify the time course. A longstanding difficulty may have become acutely worse, and a recent improvement may be fragile or incomplete. The formulation should explain that change rather than reproduce a static list.
Use structured tools for their actual purpose
The Columbia Suicide Severity Rating Scale, as described by its developers and reviewed on 27 September 2026, structures enquiry about suicidal ideation and behaviour. Different versions serve different settings. Use the appropriate instrument and its instructions rather than a shortened sequence invented from memory.
Do not stop clinical enquiry merely because one preliminary question about a passive wish for death is denied. Active thoughts, behaviour and other concerns are not safely excluded by that single response. Equally, do not convert the instrument's descriptive distinctions into a claim that an individual future outcome is predictable.
NICE NG225 explicitly advises against using risk scales to predict future suicide or repeated self-harm, to determine treatment or discharge, or to assign global low, medium or high risk categories for those purposes. It recommends focusing on needs and safety and including risk formulation in psychosocial assessment. These recommendations are available in NICE's risk-assessment section, checked on 27 September 2026.
Build a formulation rather than a category
A formulation connects the person's background with the current change, immediate concerns, available supports, uncertainties and the circumstances in which the situation could worsen. It should be understandable to another clinician and, where appropriate, to the person themselves.
For the fictional case below, "moderate risk" communicates less than: "Distress has increased after a relationship breakdown and loss of accommodation. Thoughts have become more frequent this week, and the person reports reduced confidence in managing them when alone. They have sought help, identify a trusted friend and agree that support is needed today. The friend's availability and the immediate accommodation plan are not yet confirmed."
The second statement does not claim predictive certainty. It explains why today's needs differ from those at a previous visit and identifies the unresolved facts that matter to the plan. A formulation should change when new information arrives.
| Assessment area | Useful documentation | Unhelpful shortcut |
|---|---|---|
| Current experience | Person's account of thoughts, distress and change | Screening score alone |
| Behaviour | Relevant reported actions and timeframe | Assuming no behaviour because one item was negative |
| Context | Recent events and practical pressures | A generic risk-factor list |
| Support | Who is available, when and with what agreement | Naming a relative without checking availability |
| Uncertainty | Important information not yet established | A reassuring global label |
| Plan | Actions, responsibility, timing and contingencies | "Safety advice given" without detail |
Make a collaborative safety and follow-up plan
A safety plan should be practical enough to use under stress. Discuss warning signs the person recognises, coping actions they find feasible, people and places that can provide support, professional or crisis contacts, and ways to make the immediate environment safer. Involve others with appropriate consent or another justified basis for disclosure, rather than assuming that a name on the record means a person has agreed to help.
NICE's safety-planning recommendations, reviewed on 27 September 2026, support collaborative planning and attention to access to means. The plan should remain accessible to the person. It is not a contract promising that they will not harm themselves, and agreement to it does not remove the need for appropriate care.
Specify who will do what and when. Confirm how the person will access the next assessment, what happens outside usual hours and what to do if the agreed support is unavailable. Do not select a routine review interval solely from a screening category. Urgency depends on the current assessment and the relevant service pathway.
Work through an original CASC practice case
Candidate role. You are assessing an adult in an urgent outpatient setting after a positive screening response. Your task is to understand the current thoughts and needs, produce a concise formulation and discuss an immediate plan with the person. You are not being asked to predict an outcome or allocate a numerical risk score.
Patient role. You have felt increasingly overwhelmed after a relationship breakdown. At first you describe wanting to disappear. You are unsure whether you can manage the evening alone and have not told a trusted friend how difficult things have become. You do not volunteer the accommodation problem until the candidate asks what the evening will look like.
First information release. The person says, "I do not have everything planned out, so perhaps I am wasting your time." A poor response is to treat the absence of a detailed plan as sufficient reassurance. A better response acknowledges the distress and explores current intent, behaviour, support and immediate needs without making the person prove that they deserve help.
Second information release. The friend initially named as support is away and cannot be reached. The candidate must revise the plan rather than continue to document "good social support". Explore other appropriate support and arrange the necessary clinical response. The exercise tests whether new information changes the decision.
Third information release. The person agrees to further assessment but is anxious about what it involves. Explain the purpose, practical arrangements and next contact in plain language. Do not promise a particular admission or discharge outcome before the responsible service has assessed the person.
An original safety-planning conversation
A useful question is: "When the thoughts become harder to manage, what do you notice first?" Follow with a feasible coping step rather than a generic instruction to distract themselves. Ask which person could actually be contacted, whether the person would like help making that contact, and what the alternative is if there is no response.
For this fictional encounter, the draft plan records the person's warning signs, a coping action they have previously found useful, an agreed supportive contact whose availability is confirmed, the professional assessment being arranged and a clear route for urgent help if the situation worsens. It also records the accommodation concern and who is addressing it.
The plan is intentionally not a universal template for discharge. The learner should be able to explain why the current level of support is appropriate and what uncertainty remains. Where immediate safety cannot be adequately addressed, the response must escalate through the relevant urgent pathway rather than rely on a written document alone.
Document reasoning and avoid category-driven triage
Retain the useful distinction between passive thoughts, active thoughts, intent, plans and behaviour, but do not assign automatic review intervals or dispositions to those labels. The previous category-based shortcut is replaced here by assessment, formulation and a documented, individualised plan. A negative answer to one early question is not a universal stopping rule.
For primary-care, AKT and UKMLA learning, the examination task may ask for assessment, urgent escalation, treatment of a physical complication or follow-up. Identify which decision is actually being tested. In CASC rehearsal, observe how the candidate responds when the person's account changes, not just whether every question was asked.
Per iatroX product information, September 2026, its Socratic Tutor and simulations can support learning about these distinctions and reviewing the reasoning in a fictional encounter. Neither an AI-generated formulation nor a simulated score establishes that a real person is safe or that a learner is independently competent to manage the situation.
Frequently asked questions
Does a positive PHQ-9 item 9 automatically mean emergency admission?
No. It requires appropriate follow-up assessment, with urgency and disposition determined by current needs, clinical findings and the available care pathway rather than the item alone.
Can a low risk-scale category justify discharge after self-harm?
No. NICE NG225 advises against using scales or global risk categories to determine treatment or discharge; assessment, formulation and a needs-based safety plan are required.
Is a safety plan the same as a promise not to self-harm?
No. It is a collaborative, practical plan for recognising difficulty, obtaining support and responding to deterioration, not a guarantee or a replacement for appropriate care.