送交者: mangolasi 于 2005-12-06, 16:41:42:
回答: I guess your opinion is that the mortality rate of 由 mangolasi 于 2005-12-06, 16:36:09:
are different across age.
e.g. total population, 5% educated
over 60, 1% educated
among 30-60, 10% educated.
in such case, comparing cohorts of education is less meaningful than comparing sub-cohorts of a certain cohort of age. However, comparing inside the cohort of age did not consider the right censor (truncated???) problem mentioned in the article.
Come back tomorrow.