Rosuvastatin and Astorvastatin....Crestor and Lipitor respectively, I prefer the brand names. 

If we assume that the Crestor arm shows RRR of ~60% but overall BETonMACE succeeds with the primary endpoint and shows RRR of ~30%....so in this hypothetical BETonMACE meets the primary endpoint, however the Lipitor arm's RRR is neglible and not statistically significant. 

My question is about patients taking Lipitor.....Could they be switched to Crestor or is there perhaps a reason why they're on Lipitor and not Crestor?