Background: This study aimed to examine possible effects of implementing a national query program onsite-specific cancer mortality rates. Materials and
Methods: A total of 2,874 query letters were sent out by theDepartment of Statistics, Ministry of Health and Welfare of Taiwan between January 2009 and December 2011to medical certifiers who reported “neoplasm with uncertain nature” on the death certificate asking for moredetailed information for coding.
Results: Of the 2,571 responses, in 1,398 cases (54%) medical certifiers werestill unable to determine the nature of the neoplasm. There were four neoplasm sites for which more than 50%of the responses changed the category to malignant, the gastrointestinal system (73%), urinary system (60%),stomach (55%) and rectum (53%). The liver was the cancer site that showed the largest absolute increase in thenumber of deaths after the query; however, the brain showed the largest relative increase, at 12%.
Conclusions:Different neoplasm sites showed different magnitudes of change in nature after the query. Brain cancer mortalityrates exhibited the largest increase.