4at screening tool

The 4AT or 4 ’A’s Test is a simple and short (<2 min) delirium detection tool purposely designed for easy clinical use. It does not require special training.

The 4AT is the most validated delirium tool in the literature, with 33 diagnostic test accuracy studies involving >6000 patients. It is highly sensitive and specific.

The 4AT is highly effective in clinical practice. Multiple studies prove that the 4AT is sensitive to delirium when used in routine care, and has good completion rates.

It is one of the most-used delirium tools globally, and is recommended in multiple guidelines.