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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Stat Methods Med Res. 2019 Oct 1;29(7):1891–1912. doi: 10.1177/0962280219877520

Figure 1:

Figure 1:

Three commonly-used two-stage SMART designs. Each design varies in choice of which subsets of participants are re-randomized. Circled R indicates randomization, capital letters indicate (potentially non-unique) treatments, and a– provides a coding system used to index embedded DTRs.