How should I assess a patient's decision-making capacity when they want to leave the hospital against medical advice (AMA), including which specific questions to ask and how to document the assessment properly?

Assessing Capacity for Patients Leaving AMA

When a patient wants to leave against medical advice, you must formally assess their decision-making capacity using a structured four-part test: can they understand the information about their condition and treatment, retain it, use and weigh it to make a decision, and communicate that decision back to you.

The Capacity Assessment Framework

The legal standard for capacity assessment is clear and must be applied systematically 1. Capacity must be assumed unless proven otherwise, and you cannot judge someone as lacking capacity simply because they make what appears to be an unwise decision 1. This is a critical pitfall—many clinicians incorrectly assume that choosing to leave AMA indicates incapacity, when in fact competent adults have the legal right to refuse treatment even if it may result in death 1.

The Four Questions to Ask

Structure your assessment around these specific domains:

1. Understanding:

• "Can you tell me in your own words what medical condition brought you here?"
• "What treatment are we recommending and why?"
• "What do you understand could happen if you leave now?"

2. Retention:

• "Can you repeat back to me what we just discussed about your condition?"
• Test this after a brief interval to ensure information is retained

3. Using and Weighing Information:

• "What are you considering as you make this decision?"
• "What risks and benefits are you weighing?"
• "How does leaving now compare to staying for treatment in your mind?"
• "What makes leaving the better choice for you right now?"

4. Communication:

• Can the patient clearly articulate their decision and reasoning?

Critical Considerations

Capacity is decision-specific 1—a patient may have capacity for simple decisions but not complex ones. The assessment must match the complexity and risk of the specific situation at hand.

An impairment must be present: Under the Mental Capacity Act framework, incapacity must result from "an impairment of or disturbance in the functioning of their mind or brain" 1. Consider:

• Acute intoxication or withdrawal
• Delirium or altered mental status
• Severe psychiatric illness
• Head injury or metabolic encephalopathy

If no such impairment exists, the patient has capacity regardless of how poor their reasoning appears 1.

The Harm Reduction Approach

Before accepting an AMA discharge, explore alternatives and reduce harm 2, 3. This patient-centered approach often prevents the AMA discharge entirely:

• Identify the real reason: Is it financial concerns, family obligations, fear, mistrust, or discomfort with waiting? 4 found social reasons were the most common driver (37.5% of cases)
• Propose alternatives: Shorter observation periods, outpatient follow-up, addressing specific concerns
• Negotiate partial treatment: If they won't stay for admission, will they accept IV antibiotics and close follow-up?
• Remove barriers: Involve social work, patient relations, or financial counselors 4

Documentation Requirements

Your documentation must be thorough and specific to provide legal protection 3, 5. A properly executed AMA discharge can prove that your duty ended and the patient assumed risk. Document:

Essential Elements:

1. The capacity assessment itself:

   • Document each of the four domains tested
   • Record the patient's specific responses demonstrating understanding
   • Note any impairments considered and why capacity was or wasn't affected
   • If capacity is intact, explicitly state: "Patient has decision-making capacity for this decision" 3

2. Information disclosed:

   • Specific diagnosis or working diagnosis
   • Recommended treatment plan and why it's needed
   • Material risks of leaving: What specific complications could occur and their likelihood 6
   • Alternative options discussed
   • Risks of doing nothing 6
   • Document that the patient understood these risks 3

3. The patient's reasoning:

   • Why they want to leave
   • What they understand about the risks
   • Their plan after leaving

4. Harm reduction efforts:

   • Alternatives offered
   • Partial treatments accepted or declined
   • Discharge instructions provided
   • Follow-up arranged
   • Prescriptions given
   • Return precautions explained

5. Witness if possible: Having another clinician or nurse witness the discussion strengthens documentation 3

The AMA Form

The AMA form alone does not waive liability 5. It's a component of proper documentation, not a substitute for the assessment and discussion. The form should be signed only after the capacity assessment and risk discussion are complete.

When Capacity is Questionable

If you genuinely doubt capacity after systematic assessment:

• Seek immediate consultation: Psychiatry, neurology, or ethics depending on availability and the nature of concern 1
• Consider temporary holds: If the patient poses imminent danger to self due to psychiatric illness, involuntary psychiatric holds may apply (jurisdiction-dependent)
• Document extensively: Why you question capacity, what impairment you've identified, consultations obtained
• Seek legal advice for highly irrational decisions: When a decision is based on persistent misinterpretation despite repeated explanation, this may indicate incapacity, but this determination is legally complex 1

Common Pitfalls to Avoid

• Assuming incapacity from the AMA decision itself: This is circular reasoning and legally invalid 1
• Inadequate risk disclosure: You must explain material risks even if small, and what could happen by doing nothing 6
• Relying on the form alone: Documentation in the medical record must stand independently 3, 5
• Not exploring alternatives: A patient-centered approach often resolves the situation 2
• Judging capacity based on appearance, diagnosis, or behavior: These cannot be the basis for capacity determinations 1

Patients leaving AMA have worse outcomes 7—higher readmission rates, longer subsequent stays, and increased mortality risk. Your thorough assessment and harm reduction efforts serve both the patient's wellbeing and your professional obligations.