Development and feasibility of a smartphone-based test for the objective detection and monitoring of attention impairments in delirium in the ICU.

Purpose: Delirium in the ICU is under-diagnosed. We evaluated feasibility and performance of a novel smartphone-based test for objectively detecting inattention in delirium.

Material And Methods: DelApp-ICU combines a behavioural assessment and an attention task, whereby participants follow simple commands and count serially presented circles (score range 0-12, lower scores indicating worse performance).