Fig. 2

Stepped-wedge design for the eight participating sites for STRIDE and iHI-FIVES implementation projects. Site sample sizes: n = 4 per stratified block, n = 2 per wave. Phases of activity (where all phases involve data collection and length of time periods will vary by project*): ■pre-implementation, ■implementation, ■ post-implementation,.and ■ administrative data collection only. *The iHI-FIVES project will combine implementation and post-implementation periods