多多并没给出任何数据，不觉得可信。你可以看看当时的报纸如何说

http://archives.chicagotribune.com/1979/10/19/page/62/article/chad-a-boy-who-died-of-cancer-and-promises


“Treated consistently with the best of scientific medicine, Chad had at least a 50-50 chance of living a full life. Those who contributed to cutting those chances have much to answer for .”

所有跟帖： 

• 但是谁知道她们会落在哪一个50那里呢？谁能保证？说这个50-50毫无意义。 -医者意也- ♂ (0 bytes) () 04/19/2015 postreply 12:42:44

• 那就选择一个0%的？ -吃与活- ♂ (0 bytes) () 04/19/2015 postreply 13:14:29

• 0% 50%，都是在信口开河的东西，随心所欲编造出来的数据，我不知道有什么可信度可言。 -医者意也- ♂ (0 bytes) () 04/19/2015 postreply 17:21:36

• 医生用的是survival rate, 小编愣给扯成living full life了。当然医生使用这些模糊的术语，也是为了进退 -Manymore- ♀ (135 bytes) () 04/19/2015 postreply 13:19:12