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. Author manuscript; available in PMC: 2019 Feb 1.
Published in final edited form as: Stat Methods Med Res. 2016 Mar 17;27(2):480–489. doi: 10.1177/0962280216632564

Figure 1.

Figure 1

A stepped wedge design with design parameters. Note: Gray areas represent periods under an experimental condition whereas blanks areas represent those under a control condition; S = total number of steps (=5); c = number of clusters per step (=2); p = number of periods per step (=3); b = number of periods at baseline (=2); I = cS = total number of clusters (= 10); J = b + pS = total number of periods per cluster (=17); N = IJK = cS(b + pS)K total number of periods per cluster (=17); N = IJK =cS(b + pS)K =total number of participants (=850) if K = 5, the number of participants per period per cluster.