WHAT IS THE 4AT?

The 4AT (preview) is a simple and short (<2 min) delirium detection tool designed for easy and effective clinical use. It does not require special training.

The 4AT is the best-validated delirium tool in the world, with 31 diagnostic test accuracy studies involving >6000 patients. It is highly sensitive and specific. The 4AT is now one of the most commonly-used tools in practice globally. It is proven in routine care, with high completion rates, and delirium detection at expected clinical rates.

Download and use is free, and always will be. No permission to use or reproduce is required.

✨ Free official 4AT apps produced by the National Health Service: Android iOS

Why use the 4AT?

USER’S GUIDE TO THE 4AT

4AT case examples

Do I need permission?

No permissions, forms, or registration are required to download and use. This includes use in Electronic Health Records (EHRs) / Electronic Medical Records (EMRs).

Other links:

A guide to delirium care

deliriumwords.com: a blog on delirium by the 4AT main author

4AT Wikipedia page

Note: responsibility for the interpretation of scores and any actions rests with the clinical team using the 4AT. As per accepted clinical practice, a diagnosis of delirium should always be made following clinical assessment by suitably qualified staff. 

 Website by Alasdair MacLullich