Absolute risk reduction

（重定向自Excess risk）

In epidemiology, the absolute risk reduction, risk difference or absolute effect is the change in the risk of an outcome of a given treatment or activity in relation to a comparison treatment or activity. It is the inverse of the number needed to treat.

单词	Excess risk
释义	Excess risk 英语百科 Absolute risk reduction （重定向自Excess risk） In epidemiology, the absolute risk reduction, risk difference or absolute effect is the change in the risk of an outcome of a given treatment or activity in relation to a comparison treatment or activity. It is the inverse of the number needed to treat.
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