为了长高不要命?

发自斯坦福——活在这个世界上,我们每天都会遭到关于各类食品,营养补充剂,化学品,药物或行为的所谓风险或保健作用的信息轰炸。恰好今年7月的《内科医学年报》就刊登了一篇文章,说每天工作超过11小时的人罹患或者死于心脏病的风险要比工作7-8小时的人高出67%。

但此项研究无法得出长时间工作引发心脏病的结论。事实上,对科学研究的最大误解就在于相关关系和因果关系的区别之上。长时间工作或许只是容易患心脏病的一个标志而已。除此之外,没准那些拥有A型人格——特别喜欢给自己施加过度压力——又嗜好培根芝士汉堡和奶油的人,或是那些本身就长期潜伏着心脏病风险的人,也喜欢长时间工作啊。

所以说,那些查出某个因素与某种健康效应相关的研究只能被视为一个初步的研究成果,其作用仅限于指导研究人员继续深入研究和分析。可惜即便是那些本应深谙此道的监管部门官员有时也会受到类似的误导并随之反应过度。

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