The difficulties associated with using Gompertz analysis for comparisons between species can be partially reduced by using a simple calculation of:

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Gompertz analysis is complicated by the fact that comparing different species using this model requires assumptions about the mortality rate constant and maximum life span, which can vary greatly between species. Therefore, to reduce some of the difficulties associated with using Gompertz analysis for species comparisons, a simple calculation of mortality rate doubling time (MRDT) can be used. This measure relates to the rate of increase of mortality with age and can be calculated using data on mortality rates at different ages. MRDT has been shown to be relatively consistent across different species and can therefore be a useful way to compare mortality patterns between them.

The Difficulties Associated with Using Gompertz Analysis for Comparisons Between