4AT Study

The 4AT as a triage test for delirium: a validation study in acutely hospitalised older patients.


To determine the diagnostic accuracy of the 4AT for delirium versus the reference standard of a DSM-IV diagnosis

Trial Design

Patients undergo a standard delirium assessment, and either the 4AT or the Confusion Assessment Method (CAM). Clinical outcomes and resource utilisation are recorded at 12 weeks after admission.

Eligibility criteria

Patients aged over 70 admitted to the Emergency Department.

Status: closed

Start Date

August 2015

Coordinated by

EMERGE team on behalf of University of Edinburgh and NHS Lothian

Main Trial Site


End date

Predicted June 2017