WHAT IS THE 4AT?

The 4AT 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 most-validated delirium tool in the literature, with >27 diagnostic test accuracy studies involving >5000 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 is required.

✨ New! Free 4AT apps: Android iOS



Do I need permission to download and use?

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



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