My wife tends to agree with you, but I find "all-cause-mortality" to be a loose and poor control in this study as that was not the intent of the study. V vs V was the initial intent, to my understanding.The study compares the two, but there is clearly an increase in all-cause mortality for those getting the shts when compared to those not getting them. The increase in all-cause mortality is there for BOTH. They are comparing the difference between two increases over and above non-treatment, all-cause mortality.