Fig. 1From: The POP (Permanent Supportive Housing Overdose Prevention) Study: protocol for a hybrid type 3 stepped-wedge cluster randomized controlled trialPOP study stepped-wedge RCT designLegend: Schematic of the stepped-wedge RCT design. Each building will be randomized to one of 4 waves during which they will receive the 6-month technical assistance intervention. There is a 1-month break/buffer period between each wave to facilitate measurement (e.g., staff surveys and fidelity checklist completion) and preparation for the subsequent wave. Not shown in the figure is that formal measurement of sustainment will occur for each building in the 8th month following wave completionBack to article page