The quality of the data is subject to different reporting and classification procedures in each country (certification and coding procedures). Procedures for the collection of COD data are relatively homogenous among European countries (death certificate, use of ICD).
Important quality and comparability issues nevertheless remain. Based on the report “Comparability and Quality Improvement of the European Causes of Death Statistics” (http://forum.europa.eu.int/Public/irc/dsis/health/library?l=/reports/causessofsdeath&vm=detailed&sb=Title), the work on improving certification and coding procedures is continuing.
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