Fig. 2From: Age Nutrition Chirurgie (ANC) study: impact of a geriatric intervention on the screening and management of undernutrition in elderly patients operated on for colon cancer, a stepped wedge controlled trialSchematic representation of the step wedge design of the ANC study: each line represents a center (n = 5). Each square represents a time unit (6 months period); white squares: control units (intervention is not yet implemented); blue squares: intervention units (intervention is implemented)Back to article page