1. 从NHS文章看，高胆固醇病人应该被筛选掉了，只选了有平均胆固醇水平的病人。
Only people with average levels of low-density lipoprotein (LDL or “bad” cholesterol) in their blood were included. Those who had serious heart problems, high blood pressure, previous stroke, uncontrolled diabetes, liver or kidney disease, cancer, a history of alcohol or drug abuse, or women who might become pregnant, were not included in the study.

问题的关键是心肌梗塞后接受降胆固醇治疗是不是属于常规。
一篇关于1998的一个报告的中文新闻说：“北美仅有30％的病人在心肌梗塞后接受降胆固醇治疗，许多欧洲国家和亚太地区的情况与此类似，而英国接受降胆固醇治疗者仅为10％左右。”（
http://info.lib.gov.cn/data/118/413/423/2006-04-29/news41242/41242.htm）如果这样，应该就没有多大问题。

2. 这种预防性治疗试验应该包含死亡率指标。比如上面说的1998报告。
癌症死亡指标以前倒是很可能没有，所以NHS文章对癌症结果有疑问。