The vascular depression subtype: evidence of internal validity.

Published

Journal Article

Vascular depression has been proposed as a unique diagnostic subtype in late life, yet no study has evaluated whether the specified clinical features associated with the illness are jointly indicative of an underlying diagnostic class.We applied latent class analysis to two independent clinical samples: the prospective, cohort design, Neurocognitive Outcomes of Depression in the Elderly (NCODE) study and the 8-week, multicenter, double blind, placebo-controlled Old-Old study.A two-class model consisting of vascular and nonvascular depressed patients provided an excellent fit to the data in both studies, chi(2)(6) = 2.02, p = .90 in the NCODE study and chi(2)(6) = 7.024, p = .32 in the Old-Old study. Although all of the proposed features of vascular depression were useful in identifying the illness, deep white matter lesion burden emerged with perfect sensitivity (1.00) and near-perfect specificity (.95), making it the only indicator necessary to determine class membership.These findings, replicated across two independent clinical samples, provide the first support for the internal validity of vascular depression as a subtype of late-life depression.

Full Text

Duke Authors

Cited Authors

  • Sneed, JR; Rindskopf, D; Steffens, DC; Krishnan, KRR; Roose, SP

Published Date

  • September 2008

Published In

Volume / Issue

  • 64 / 6

Start / End Page

  • 491 - 497

PubMed ID

  • 18490003

Pubmed Central ID

  • 18490003

Electronic International Standard Serial Number (EISSN)

  • 1873-2402

International Standard Serial Number (ISSN)

  • 0006-3223

Digital Object Identifier (DOI)

  • 10.1016/j.biopsych.2008.03.032

Language

  • eng