Modified Preston-Bennett Method for Estimation of Adult Mortality in Developing Countries
Eleazar C. Nwogu
Department of Statistics, Imo State University, Owerri, Nigeria.
Felix N. Nwobi
Department of Statistics, Imo State University, Owerri, Nigeria.
Chinonso O. Okoro *
Department of Statistics, Imo State University, Owerri, Nigeria.
*Author to whom correspondence should be addressed.
Abstract
This study proposes a modified Preston-Bennett method for the estimation of adult mortality in developing countries. Unlike the previous method, the proposed method derives estimates of adult mortality directly from the 5-year age distribution at the mid-point of the inter-censal period. In other words, it does not convert the 5-year age distributions to single years before estimation. Results obtained from empirical studies compared favourably well with those from the original Preston-Bennett method and therefore, recommend for the estimation of adult mortality in developing countries.
Keywords: Adult mortality, census, expectation of life, survival ratio, inter-censal