4AT

This article is about the medical scale for delirium. For the Australian radio station, see ABC Far North.

The 4 'A's Test (4AT) is a bedside medical scale used to help determine if a person has positive signs for delirium. The 4AT also includes cognitive test items, making it suitable also for use as a rapid test for cognitive impairment. A 2025 study using large scale routine clinical data reported that 4AT scores were associated with dementia as well as delirium.

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