This paper concerns methods used by epidemiologists and demographers to compare sub-populations. Three groups of methods are examined: methods based on standardisation (direct and indirect), Mantel-Haenszel methods, and log-linear modelling. For each group, methods based on mortality rates are distinguished from those based on proportional mortality data. The use of log-linear modelling in studies of cancer risk in migrants is discussed, to illustrate an application of the case-control approach, and more generally to illustrate standard applications of log-linear modelling in the analysis of mortality based on civil registration statistics. -English summary

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epidemiological method log-linear modelling differential mortality analysis mortality data mortality differential Migrants