Figure 1From: Impact of a multifaceted program to prevent postoperative delirium in the elderly: the CONFUCIUS stepped wedge protocol Design of the CONFUCIUS study. One cluster (C1, C2 or C3) represents one surgical ward. One unit (control or intervention) represents one time period of one cluster. "White square": "control" unit = surgical wards without multifaceted prevention program "Black square": "intervention" unit = surgical wards with multifaceted prevention programBack to article page