This is the peer reviewed version of the following article:Jennison, C, Turnbull, BW. Authors' Reply. Statistics in Medicine. 2019; 38: 5670– 5671. , which has been published in final form at https://doi.org/10.1002/sim.8417. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.