me33, maybe you or someone else can explain to me how they are determining the PE. They are measuring "time to event". I don't take that as strictly looking at the number of events only in the 2 groups and doing a ratio, although that would be an effect of time. In cancer trials, most of the time everyone dies, but they are looking at extending life, sometimes by only months and the trail is considered a success. Am I reading something into this that is just not there?