In this multi-institutional, multinational point prevalence study of 994 subjects, delirium screening by the bedside nurse was feasible in children of all ages. PD was a common complication of critical illness, with a prevalence of 25% and identifiable risk factors. Future large-scale multi-institutional studies in this field, including longitudinal studies, are warranted to better determine the time course of delirium, understand its burden to childhood health, and its relationship with important clinical outcomes.

Fifteen sites participated in the first study day, enrolling 416 children; 24 sites participated in the second study day, enrolling 578 children. In total, 25 different institutions and 994 subjects were included.

The majority of the sites (n = 21; 84%) were in the United States with additional sites in the Netherlands, New Zealand, Australia, and Saudi Arabia. Twenty-two PICUs were university affiliated and three were in community hospitals. Number of PICU beds ranged from 10 to 81, with a median of 36 beds.

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