International Journal of Epidemiology 2000;29:878-884
© International Epidemiological Association 2000
Analysing the difference due to risk and demographic factors for incidence or mortality
a Service de Biostatistique, Batiment 1M, Centre Hospitalier Lyon Sud, 165 Chemin du Grand Revoyet, 69495 Pierre-Benite, France.
b Current address: Amgen Ltd, 240 Cambridge Science Park, Milton Road, Cambridge CB4 0WD, UK.
Background From an epidemiological and public health perspective there is an interest in quantifying differences in incidence and mortality between either time points, geographical areas or males and females. We propose a method for splitting such a difference in the number of cases/deaths into three components: (1) those due to risk; (2) those due to population structure (i.e. age distribution); and (3) those due to population size. We also propose graphical methods for presenting the results. Three examples are used to illustrate our methodology.
Keywords Incidence, mortality, risk, demography, rate, cancer
Accepted 24 March 2000