Your English writing platform
Discover LudwigExact(7)
The subspaces of the interim sample space to perform separate optimizations remain the same (see Appendix A3).
Simulations indicate that this decision rule is accurate already at an interim sample size n as low as 20.
As such, an interim sample size analysis will also be conducted at n = 50 allowing for an acceptable estimate of the population standard deviation and hence considerably more robust sample size calculation to ensure adequate power.
The experimenter may set the second stage sample sizes to in the treatment groups and to in the control group with the second-to-first-stage-ratios, based on the interim sample means.
We did a blinded interim sample size review [ 41] after we had recruited 41 participants to estimate the intra-cluster correlation coefficient (ICC) to allow a re-calculation of sample size.
Secondly, the maximum type 1 error only occurs if the experimenters apply the worst case sample size reassessment rule (maximizing the conditional type 1 error rate) at any point in the interim sample space.
Similar(53)
During interim, samples were kept cold.
The simulations were done fixing interim and final sample sizes to these values.
At the third interim analysis, the sample path crossed the upper boundary and the trial was stopped.
As an interim measure, a sample mortality surveillance system has been developed in Vietnam, to provide nationally-representative data on mortality and causes of death [ 11].
When information emerges from external sources or interim analyses, the sample size might be adapted, which can make the trial more successful or efficient without reaching the originally planned sample size.
Write better and faster with AI suggestions while staying true to your unique style.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com