Multiple causes of death include all causes and conditions reported on the death certificate (i.e. both underlying and associated causes; see Glossary for further details). These statistics are valuable in providing an accurate portrayal of mortality in deaths attributable to a number of concurrent disease processes.
When analysing data on multiple causes of death, data can be presented in two ways: by counts of deaths or counts by mentions. For example, an individual may have had Breast cancer (C50) and then developed Secondary lung cancer (C78.0). This individual would be counted once if counts were by the number of deaths, but twice if the counts were by the number of mentions of cancer.