《思考,快与慢》S308.你怎么这么“胆小” episode artwork

EPISODE · Aug 25, 2016 · 9 MIN

《思考,快与慢》S308.你怎么这么“胆小”

from 开浩御书房 · host 开浩御书房

我们对风险的认知不足不止是对其概念的误解,更受其数字影响,很多时候我们并不清楚媒体报道的风险数据指的是“相对风险”或“绝对风险”。英国曾经有一段时间堕胎人数剧增,其原因就是对避孕药的恐慌。这一恐慌来自英国的这样一条报道:英国药物安全委员会警告称服用第三代避孕药患血栓的风险增至一倍,也就是100%。但事实上这个100%指的是在第二代避孕药的基础上的相对风险,即假如有七千人服用第二代避孕药,会有1人患上血栓,这个百分之百意思是,七千人服用第三代避孕药,会有2人患血栓,并不是指服用的人100%就会患病,而是增长率是百分之百而已,这个风险就是相对风险。

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《思考,快与慢》S308.你怎么这么“胆小”

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