4AT (<4)

<aside>

❓ Screening tool for Delirium

• Sensitive (vs. CAM)
• ↑Higher = bad
• When to use: admission to ward/ICU, long ED stay
• Link to online tool:
  • https://www.mdcalc.com/calc/3982/4-test-delirium-assessment </aside>

Diagnostic Validity

• Interpretation:

Limitations

• Less specific vs. CAM
  • Consider Cognitive impairment as alternative diagnosis
• Less researched (esp. in ICU setting)

Head-to-head Comparison with other tests

vs. CAM - Confusion Assessment Tool

• More sensitive → can pick up hyposensitivity (score positive even in sleep)

  

Protocol

3A of Delirum DSM diagnosis + AMT4

• Acute changes or fluctuating course
• Attention
• Alertness

AMT4 (=4)