Malmquist Jörgen
Lakartidningen. 2002 Feb 21;99(8):751-3, 756.
Categorical scientific data consisting of counts of events are frequently reported as risk or odds figures. Given a certain set of data, odds always differs upwards from risk. The relation between two risk figures may be expressed in various ways, one of which is the risk ratio. In the case of two odds figures, the choice is almost always the odds ratio. With a certain set of data from two groups, the odds ratio is not identical to the risk ratio (except when both are equal to 1). The odds ratio always magnifies the intergroup difference. When assessing published data, one must take care to observe whether reported ratio figures denote risk ratios or odds ratios.
由事件计数组成的分类科学数据经常以风险或比值的形式报告。对于某一组给定的数据，比值总是比风险值高。两个风险值之间的关系可以用多种方式表示，其中一种是风险比。对于两个比值来说，几乎总是选择比值比。对于来自两组的某一组数据，比值比与风险比并不相同（除非两者都等于1）。比值比总是会放大组间差异。在评估已发表的数据时，必须注意观察报告的比值数据是表示风险比还是比值比。
