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Correction to: Optimality criteria for futility stopping boundaries for group sequential designs with a continuous endpoint

  • The original article was published in BMC Medical Research Methodology 2020 20:274

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.

Fig. 1
figure1

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

Reference

  1. 1.

    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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Correspondence to Geraldine Rauch.

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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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