Fig. 3From: HELP! Problems in executing a pragmatic, randomized, stepped wedge trial on the Hospital Elder Life Program to prevent delirium in older patientsSchematic representation of the inclusion of patients per period in each cluster in the actual study design of the stepped wedge, cluster randomized trial. Orange boxes, cluster not exposed to intervention. Green boxes, cluster exposed to intervention. Beige boxes, cluster in which no patients were included in the specified period. * Participating units 1–10 were randomized to clusters subsequently starting to use the interventionBack to article page