Suggests the presence of delirium.
4AT Delirium Score Calculator
A1: Alertness
Assess the patient’s level of alertness. If they are clearly abnormal (drowsy, stupor, coma, or agitated/hyperactive), score 4. If mildly sleepy (rouses to voice, then closes eyes), score 1. Otherwise, score 0.
A2: AMT4
Ask the patient their age, date of birth, the current place (e.g., hospital name, town), and the current year. Score 0 if 4-5 correct, 2 if 0-3 correct.
A3: Attention
Ask the patient to state the months of the year backwards, starting from December. Score 0 if 7 or more correct, 1 if less than 7 correct or untestable.
A4: Acute change or fluctuating course
Is there evidence of acute change or fluctuation in alertness, cognition, or other mental functions from the patient’s usual baseline, or has it fluctuated over the last 24 hours?