Replies to post #5711 on Dendreon Corp fka DNDNQ

[exwannabe]

And another stat question.

As I play around with a calculator, it seams that the final P value in OBF with a single interim peek will be around .48 with the interim at 50% of events and drop to around .4 as the interim gets out towards the 90% event time.

So, if the trial was always using OBF, how did pushing the interim back help the final alpha allocation? It should have hurt it.