Correction to: BMC Med Res Methodol 20, 274 (2020)
https://doi.org/10.1186/s12874-020-01141-5
Following publication of the article [1], it was noted that due to a typesetting error the old version of Fig. 1 is displayed with the correct version of Fig. 1, and it should be deleted.
The correct Fig. 1 and caption have been included in this correction, and the original article has been corrected.
The “optimal” futility boundary α0,opt as a function of the admissible parameters Powloss and πwrong for N = 140 (blue dots) and n = 188 (red squares). The black symbols highlight the “optimal” futility boundaries for Powloss = 0.05 and πwrong = 0.05
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Li X, et al. Optimality criteria for futility stopping boundaries for group sequential designs with a continuous endpoint. BMC Med Res Methodol. 2020;20:274.
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Li, X., Herrmann, C. & Rauch, G. Correction to: Optimality criteria for futility stopping boundaries for group sequential designs with a continuous endpoint. BMC Med Res Methodol 20, 280 (2020). https://doi.org/10.1186/s12874-020-01161-1
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DOI: https://doi.org/10.1186/s12874-020-01161-1