How do you mean it? One early look (@60%) exists already, agreed w FDA. What is the danger in case of additional, same type of look at different stage(s)?
??? I did not say this. I said:
It means, [as an example, no calculation behind it]: instead of 0.0076 p value, 0.01 will be enough @60% and the power will remain sufficient -> 22-23 eff% will be enough for early stop instead of 25-27%