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The sixth revision of the International List of Causes of Death was accompanied by a drastic change in the method of medical certification of cause of death. The selection of a principle cause is no longer accomplished by means of an arbitrary set of rules but is the responsibility of the certifying physician. As a result of these changes, the continuity of trend series of causes of death has been greatly disturbed and comparison with previous decades extremely difficult. For example, the death rate from diabetes has dropped by more than 50% merely as a result of these changes.
The present booklet was prepared by the W.H.O. Center for Classification of Diseases to indicate the difficulties encountered in maintaining continuity of statistics of causes of death and to provide data which may be useful in achieving comparability. Most useful is a table presenting the International List categories, sixth revision in terms of categories in fifth revision.
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