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25 Jun 2008 : Column 392Wcontinued
Table 2: Number of deaths where breast cancer was the underlying cause of death, by sex and strategic health authority (SHA)( 1) , 1996 to 2006( 2) | |||||||||||
SHA | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
(1) Breast cancer was defined using the International Classification of Diseases, Ninth Revision (ICD-9) codes 174 and 175 for the years 1996 to 2000, and the International Classification of Diseases, Tenth Revision (ICD-10) code C50 for the years 2001 to 2006. The introduction of ICD-10 in 2001 had a significant effect on mortality rates for some diseases, causing a discontinuity in mortality trends for these causes of death. However ONS practice is not to adjust the historical numbers of deaths shown in PQ answers. More information on this issue can be found at www.statistics.gov.uk/icd10mortality. For female breast cancer the introduction of ICD-10 caused an increase of 2.7 per cent. in the number of deaths. An article specifically examining the changes for cancer trends was published in Health Statistics Quarterly 23*. This article also presents comparability ratios (the ratio of the number of deaths coded to a cause in ICD-10 to the number coded to the equivalent cause in ICD-9) for the most common cancer sites. * Brock A, Griffiths C, Rooney C (2004) The effect of the introduction of ICD-10 on cancer mortality trends in England and Wales. Health Statistics Quarterly 23, 7-17 (2) Figures are for deaths registered in each calendar year. |
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