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NEUROLOGY 2004;63:822-827
© 2004 American Academy of Neurology

Higher frequency of dementia in older HIV-1 individuals

The Hawaii Aging with HIV-1 Cohort

V. Valcour, MD, C. Shikuma, MD, B. Shiramizu, MD, M. Watters, MD, P. Poff, PhD, O. Selnes, PhD, P. Holck, PhD, J. Grove, PhD and N. Sacktor, MD

From the University of Hawaii NeuroAIDS Specialized Neuroscience Research Program (Drs. Valcour, Shikuma, Shiramizu, Watters, Poff, Holck, and Grove), John A. Burns School of Medicine, Honolulu, HI; and Johns Hopkins University School of Medicine (Drs. Selnes and Sacktor), Baltimore, MD.

Address correspondence and reprint requests to Dr. Victor Valcour, Office of Neurology and Aging Research, Sinclair 202, Leahi Hospital, 3675 Kilauea Avenue, Honolulu, HI 96816; e-mail: Vvalcour{at}hawaii.edu

Background: Antiretroviral therapy has improved survival for HIV-1-infected individuals. The neuroepidemiologic implications of HIV-1 in an aging population are not well known, particularly the prevalence of HIV-associated dementia (HAD).

Methods: The authors report a baseline cross-sectional analysis of 202 HIV-1-seropositive individuals enrolled into one of two groups of the Hawaii Aging with HIV Cohort: older (50 or more years old, n = 106) and younger (20 to 39 years old, n = 96). Neuropsychological, neurologic, medical, and laboratory data were obtained at enrollment. Participant cognitive status was classified (research case definitions) using American Academy of Neurology (1991) criteria in a consensus conference of physicians and neuropsychologists.

Results: HAD was more frequent in older (25.2%) compared to younger (13.7%) individuals (p = 0.041) corresponding to an OR of 2.13 (95% CI: 1.02 to 4.44) for the older compared to the younger group. After adjusting for education, race, substance dependence, antiretroviral medication status, viral load, CD4 lymphocyte count, and Beck Depression Inventory score, the odds of having HAD among individuals in the older group was 3.26 (1.32 to 8.07) times that of the younger group.

Conclusions: Older age is associated with increased HAD in this HIV-1 cohort. Underlying mechanisms are unclear but do not appear related to duration of HIV-1 infection.

Received May 23, 2003. Accepted in final form April 27, 2004.


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