4AT — delirium screening

4AT — delirium screening

Principle

Screening for delirium and cognitive impairment.

Scope

Local French adaptation of 4AT v1.2: abbreviated labels and contextual guidance. Adult screening, particularly older people. Consider communication and usual functioning. NT can score 2 for AMT4/attention, unlike Glasgow. Unknown information is not a negative response. Validation evidence for the official instrument does not validate this adapted interface.

Interpretation limits

≥4: possible delirium, with or without cognitive impairment. 1–3: possible cognitive impairment. 0 does not exclude these disorders. Missing data block the total, but an already supported flag ≥4 remains visible; diagnosis requires clinical assessment.

Formula and logic

4AT = alertness(0/4) + AMT4(0/1/2) + attention(0/1/2) + acute change(0/4). Total 0–12.

Interpretation

0–0

No test flag

1–3

Possible cognitive impairment

4–12

Possible delirium

Definition version : 0.2.0

Sources

• MacLullich, Ryan et Cash · 4AT — 4AT — guide officiel, version 1.2

  Accessed on 2026-10-06 · Four items and scoring 0–12. AMT4 not testable=2; attention not testable=2, refusal=1. ≥4 suggests delirium, without automatic diagnosis.

• 4AT · traduction française — Version française officielle, instructions 1.2

  Accessed on 2026-10-06 · French translation by Voyer, Wilchesky, Richard, Pelletier, Ballard and Lundu (Université Laval, 2016). Abbreviated/paraphrased labels in this local adaptation; instructions 1.2.

• 4AT — Attribution et licence CC BY 4.0

  Accessed on 2026-10-06 · Adapted from 4AT © 2011–2014 Alasdair MacLullich, Tracy Ryan and Helen Cash, under CC BY 4.0. Changes: local French, abbreviated labels, interactive form and partial flag. No warranty or author approval; validation of the official instrument does not automatically transfer to this adaptation.

• Creative Commons — Licence Attribution 4.0 International (CC BY 4.0)

  4.0 · 4AT content licence; attribution and changes retained. Licence distinct from the capsule code licence.