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In the logistic regressions, our dependent variables reflect the decedent's race as recorded on the death certificate (coded 1 for American Indian, Eskimo, or Aleut, and 0 for all other races in the cirrhosis models, and coded 1 for Black and 0 for all other races in the homicide models).
The positive predictive value (PPV) of death certificate coding of stroke was 100% (i.e. all cases with death certificates coded as stroke were stroke by study criteria).
Death certificate codes were recorded according to the International Classification of Diseases, 9th Revision (ICD-9).
This suggests that there may have been a subtle shift in death certificate coding allocation from 'colon' to 'rectum' over the period we have examined.
The transition to the 10th revision of the ICD-10 was accompanied by changes in death certificate coding practices (priority rules).
This study has several limitations: it was performed in only 1 jurisdiction, death certificate coding practices might differ in other jurisdictions, and the overall sample size was small.
Other explanations for the temporal reduction in SIDS rates have been proposed including temporal changes in SIDS case ascertainment and death certificate coding practices.
During death certificate coding, because a specific code for COPD was not available in the International Classification of Diseases, Eighth Revision [ICD-8; World Health Organization (WHO) 1967], we noted deaths where COPD was specifically listed as the underlying cause of death.
To describe time trends of cause-specific mortality in the SNC, accounting for the unlinked deaths and for the possible effect of change in death certificate coding was necessary.
We report on all-cause and CVD mortality because the accuracy of death certificate codes is a concern in this analysis [ 25], whereas using all-cause mortality could not have induced any bias in the results.
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