Demography & Family Welfare
Best index of contraceptive efficacy is? (DNB Dec 12)
|B|| Chandeliers index|
|C||Human development index|
1. Contraceptive efficacy is generally assessed by measuring the number of unplanned pregnancies that occur during a specified period of exposure & the use of a contraceptive method. Two methods are in common use – Pearl index & life table analysis. Pearl index is defined as the number of failure per 100 women years of use.
2. Chandelers index is used in relation to hookworm infestation & refers to the worm load on the basis of average number of hookworm eggs per gram of stool. It is used in epidemiological studies to compare worm loads in different population groups, and also the degree od reduction in egg output after mass treatment.