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Table 1 Stepped-wedge study design

From: Testing the use of practice facilitation in a cluster randomized stepped-wedge design trial to improve adherence to cardiovascular disease prevention guidelines: HealthyHearts NYC

  Year 1 (months) Year 2 (months) Year 3 (months)
Clusters 3 6 9 12 15 18 21 24 27 30 33 36
  Time period
1 (80 sites)   C X X X X F F     
2 (70 sites)   C C X X X X F F    
3 (70 sites)   C C C X X X X F F   
4 (70 sites)   C C C C X X X X F F  
  1. C control period, X intervention period, F follow up period