4AT Delirium Screen
4AT Delirium Screen - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
Open the 4AT Delirium Screen → Runs in your browser. No signup, no tracking.
What this is
4AT Delirium Screen is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. 4AT Delirium Screen - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
MacLullich AMJ, Shenkin SD, Goodacre S, et al. The 4 "A"s Test for detecting delirium in acute medical patients (4AT): a diagnostic accuracy study. Health Technol Assess. 2019;23(40):1-194.
Worked example: 4AT 0 of 12: delirium or significant cognitive impairment unlikely per MacLullich 2019.
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.