Thus, after linking the two datasets with the same complete demographic data, we were able to refile 88.83% of the missing Ids for all the death certificate data of the DOH during 1980-84.

• 以户政资料包括出生年月日、死亡年月日、县市代码、乡镇代码全部变项为连结码可以填补身分证字号达88.；83%25。