Age and distance to death in the Seattle Longitudinal Study


Journal Article (Review)

A series of hierarchical regression models was used to determine if time to death was a significant independent variable for level and seven-year change in intellectual performance for 1,214 community-dwelling adults. Distance to death explained a significant amount of the variance of intellectual performance at individuals' last measurement but not of the decline in performance after controlling for age, education, gender, and survivorship. The inclusion of time to death improved the proportion of unique variance explained by about 1% to 3% and between 4% and 10.4% of the total variance explained. Decedents had lower levels of verbal meaning, spatial ability, reasoning ability, and psychomotor speed at last measurements and greater amounts of seven-year decline on verbal meaning and psychomotor speed. The inclusion of distance to death may help improve the explanation of variability in performance associated with increased age.

Full Text

Duke Authors

Cited Authors

  • Bosworth, HB; Schaie, KW; Willis, SL; Siegler, IC

Published Date

  • November 17, 1999

Published In

Volume / Issue

  • 21 / 6

Start / End Page

  • 723 - 738

International Standard Serial Number (ISSN)

  • 0164-0275

Digital Object Identifier (DOI)

  • 10.1177/0164027599216001

Citation Source

  • Scopus