A study on IUD retention by curve-fitting | Zendy

Peng-Tu Liu | Zendy; Lien-Ping Chow | Zendy; Helen Abbey | Zendy

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A study on IUD retention by curve-fitting

Author(s) -

Peng-Tu Liu,

Lien-Ping Chow,

Helen Abbey

Publication year - 1972

Publication title -

demography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.099

H-Index - 129

eISSN - 1533-7790

pISSN - 0070-3370

DOI - 10.2307/2060542

Subject(s) - life expectancy , expectancy theory , research methodology , function (biology) , demography , retention rate , medicine , population , statistics , mathematics , psychology , computer science , sociology , social psychology , computer security , evolutionary biology , biology

In order to estimate the demographic impact of IUD, there is a need for estimating IUD retention rates beyond the period of actual observation. This article describes a mixed exponential function for this purpose. With this function of IUD retention, it is possible to estimate the “life expectancy” and “half-life” of an IUD. Another important concept is the “cut-off date”, introduced in estimating the “life expectancy” because in practice no IUD will be worn by a woman forever.

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