Purpose Our aim was to collect information on delirium assessment processes and pathways in non-intensive care settings in the UK. Methods We sent a Freedom of Information request to 169 UK NHS hospitals, trusts and health boards (units) in July 2020 to obtain data on usage of delirium assessment tools in clinical practice and delirium pathways or guidelines. Results We received responses from 154 units (91% response rate). 146 (95%) units reported use of formal delirium assessment processes

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... 131 (85%) units had guidelines or pathways in place. The 4AT was the most widely used tool, with 117 (80%) units reporting use. The Confusion Assessment Method was used in 652 (45%) units, and the SQiD in 52 (36%) units. Conclusions Our findings show that the 4AT is the most commonly-used tool in the UK, with 80% of units reporting implementation. This study adds to our knowledge of real-world implementation of delirium detection methods at scale.