Association of interleukin-6 and other biologic variables with depression in older people living in the community.

Published

Journal Article

OBJECTIVES: The prevalence of depression increases with age, as does the prevalence of higher levels of the cytokine interleukin-6 (IL-6). This analysis was performed to determine the association between increased levels of this cytokine and depression in a population-based sample. DESIGN: Cross-sectional cohort study. SETTING: Rural and urban counties in North Carolina. PARTICIPANTS: Community-dwelling older people. MEASUREMENTS: The association between IL-6 and other biologic variables with self-report depression was examined in 1686 persons aged 70 years and older in the third in-person survey wave (1991) of the Duke Established Population for Epidemiologic Studies of the Elderly (EPESE). Bivariate associations were established by the Spearman correlation, adjusted for age. A stepwise linear logistic regression model was used to derive a final model to assess multivariable effects on CES-D scores. RESULTS: Depression was correlated with IL-6 (P = .011), D-Dimer (P = .017), alpha-1-globulin (P = .023), alpha-2-globulin (P = .002), and beta globulin (P = .012). After controlling for age, race, and gender, IL-6 levels remained the only biologic variable significantly associated with depression (P = .035). CONCLUSION: These data suggest that the inflammatory marker, IL-6, is associated with depression in older people in this cross-sectional study. These results are compatible with the hypothesis of cytokine (IL-6) stimulation in geriatric depression as part of an overall immunoendocrine dysregulation.

Full Text

Duke Authors

Cited Authors

  • Dentino, AN; Pieper, CF; Rao, MK; Currie, MS; Harris, T; Blazer, DG; Cohen, HJ

Published Date

  • January 1999

Published In

Volume / Issue

  • 47 / 1

Start / End Page

  • 6 - 11

PubMed ID

  • 9920223

Pubmed Central ID

  • 9920223

International Standard Serial Number (ISSN)

  • 0002-8614

Language

  • eng

Conference Location

  • United States