When the trial was halted after six years, it was clear that the doctors taking aspirin suffered a dramatically lower incidence of heat attacks and stroke, but there was no evidence that the drug had protected them from colorectal cancer.

• 在实验进行6年后结束时，服用阿斯匹林的医生心脏病和中风的发病率显然大低于服务安慰剂的医生，但却没有证据是示阿斯匹林使他们幸免了结肠癌的侵袭。