一、WHO 年報提到有關發生率之計算方式,可依各國可取得之資料,應用下列一種(或一種以上)的方法推估。
(一)incidence=cases notifications/proportion of cases detected
(二)incidence=prevalence/duration of condition
(三)incidence=annual risk of infection × Sty'blo coefficient
(四)incidence=deaths/proportion of incident cases that die |