Estimation of Denominators- a New Approach for Calculating of Various Rates in Cancer Registries

In this study, cancer incidence data were assessed to provide various rates of five year age groups for a givenyear, lying between two census years. The individual exponential growth rate method is most useful in bothpopulation-based and non-population cased cancer registries in India to estimate the population by five yearlyage groups and also find the rates of crude rates, age standard rates and cumulative rates. This method has beenshown to endure from bias and often results sacrificing the overall growth rate and correction factor must beneedful in five year age group population to maintain it. A second method, the difference distribution methodis also able to maintain the overall growth rate and overcome the bias in estimation of five yearly age grouppopulations. From this point of view these methods serving a new technique for population estimation by fiveyearly age groups for inter census years.