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A rate ratio (sometimes called an incidence density ratio) in epidemiology, is a relative difference measure used to compare the incidence rates of events occurring at any given point in time. A common application for this measure in analytic epidemiologic studies is in the search for a causal association between a certain risk factor and an outcome. : 〔http://www.ctspedia.org/do/view/CTSpedia/RateRatio〕 Where incidence rate is the occurrence of an event over person-time, for example person-years. : Note: the same time intervals must be used for both incidence rates.〔 ==See also== *Ratio *Risk ratio *Odds ratio 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Rate ratio」の詳細全文を読む スポンサード リンク
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