Factors Contributing to Use-Effectiveness

  • Jacqueline D. Forrest


A major contribution of Dr. Christopher Tietze to the evaluation of contraceptive methods was in the area of application of life-table methodology to study contraceptive effectiveness. Potter (1966) was the first to propose using life tables to calculate the risk of becoming pregnant over a certain time period of use. This was a great improvement over the use of the then commonly used Pearl Index (1932) which produced a measure of effectiveness that did not control for duration of use.


Life Table Contraceptive Method Unintended Pregnancy Fertility Control Pregnancy Intention 
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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • Jacqueline D. Forrest
    • 1
  1. 1.The Alan Guttmacher InstituteNew YorkUSA

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