Umieralność według pojedynczych przyczyn zgonu: rekonstrukcja danych dla Polski, 1970–2009

All around the world every revision of the International Classification of Diseases and Related Health Problems of the World Health Organization introduces discontinuities into data concerned with deaths by single causes. In the case of Poland an additional factor contributing to the low quality of data is the rearrangement of death registration system in 1997, in particular by changes of coding practices and the introduction of institution of medical doctor stating the underlying cause of death. This article presents the organization of the system for collecting mortality data in Poland, and discusses the method of reconstructing homogeneous data by single causes of deaths for the period 1970–2009. The description is illustrated by examples of selected causes of deaths