We compared education as recorded on the death certificate with educat
ion ascertained before death from a household survey of 10,423 persons
age 25 years or more who died in 1989. There was a tendency for the d
ecedent's education to be reported at a higher level on the death cert
ificate than at baseline. Of those who were reported as high school gr
aduates on the death certificate, 38% reported that they had less than
a high school education at baseline. The bias was more pronounced in
older than younger decedents.