Is Early Age-related Maculopathy Related to
Cognitive Function? The Atherosclerosis Risk
in Communities Study
TIEN YIN WONG, MD, PHD, RONALD KLEIN, MD, MPH, F. JAVIER NIETO, MD, PHD,
SUZANA A. D. MORAES, MD, PHD, THOMAS H. MOSLEY, PHD, DAVID J. COUPER, PHD,
BARBARA E. K. KLEIN, MD, MPH, LORI L. BOLAND, MPH, LARRY D. HUBBARD, MAT,
AND A. RICHEY SHARRETT, MD, DRPH
●
PURPOSE: Age-related maculopathy (ARM) and cog-
nitive impairment are both neurodegenerative disorders
associated with aging and have been hypothesized to
share common pathogenic pathways. We describe the
association between cognitive function and ARM in
middle-aged persons.
●
DESIGN: Population-based, cross-sectional study in-
volving participants of the Atherosclerosis Risk in Com-
munities Study, an ongoing cardiovascular investigation
of persons 51 to 70 years of age, examined every 3 years
between 1987 to 1998.
●
METHODS: At visit three (1993–1995), retinal photo-
graphs were obtained and evaluated for ARM using a
modification of the Wisconsin ARM Grading System.
Cognitive function was assessed using standardized tests
(Delayed Word Recall, Digit Symbol, and Word Fluency)
at visits two (1990 –1992) and four (1996 –1998) and
averaged for analysis. Severe cognitive impairment was
defined as scores falling in the lowest 10th percentile of
the population.
●
RESULTS: Data were available in 9286 persons after
exclusion of persons with stroke or using antipsychotic
medication. After adjusting for age, gender, race, educa-
tion, diabetes, hypertension, cigarette smoking, and alco-
hol consumption, persons with severe cognitive
impairment based on Word Fluency Test scores were
more likely to have early ARM (odds ratio [OR]: 1.6,
95% confidence interval [CI]: 1.1–2.2) and its compo-
nents, soft drusen (OR: 1.6; 95% CI: 1.1–2.3) and
pigmentary abnormality (OR: 1.5; 95% CI: 0.9 –2.5)
than those without severe impairment. However, severe
cognitive impairment in scores of the other two cognitive
function tests was not associated with ARM.
●
CONCLUSION: These population-based data suggest a
weak association between cognitive function and early
ARM in middle-aged persons. (Am J Ophthalmol
2002;134:828 – 835. © 2002 by Elsevier Science Inc.
All rights reserved.)
A
GE-RELATED MACULOPATHY (ARM) IS A LEADING
cause of visual impairment in the elderly.
1,2
The
pathogenesis of ARM remains poorly under-
stood.
3–5
Cognitive decline, with or without Alzheimer’s
disease, reflects an age-related chronic neurodegenerative
process in the brain.
6,7
Age-related maculopathy and
Alzheimer’s disease have been hypothesized to share a
common pathogenesis, based on similar histopathological
alterations related to neuronal cell loss,
3,8 –11
analogous
vascular risk factors (for example, hypertension, cigarette
smoking),
12–17
and, possibly, shared genetic susceptibility
(for example, apolipoprotein E polymorphism).
18 –20
However, few clinical data exist regarding a possible
association between cognitive function and ARM. In the
Rotterdam Study, among white persons aged 75 years or
older, late ARM was associated with 2-year incident
Accepted for publication June 11, 2002.
From the Singapore Eye Research Institute & Department of Ophthal-
mology, National University of Singapore, Singapore (T.Y.W.); Depart-
ment of Ophthalmology, University of Wisconsin, Madison, Wisconsin
(T.Y.W., R.K., B.E.K.K., L.D.H.); Department of Epidemiology, Johns
Hopkins University School of Public Health, Baltimore, Maryland
(F.J.N., S.A.D.M.); Department of Medicine, University of Mississippi
Medical Center, Jackson, Mississippi (T.H.M.); Department of Biostatis-
tics, University of North Carolina, Chapel Hill, North Carolina (D.J.C.);
Division of Epidemiology, University of Minnesota, Minneapolis, Min-
nesota (L.L.B.); National Heart, Lung, and Blood Institute, National
Institutes of Health, Bethesda, Maryland (A.R.S.).
This study was supported by contracts N01-HC-35125, N01-HC-
35126, N01-HC-55015, N01-HC-55016, N01-HC-55018, N01-HC-
55019, N01-HC-55020, N01-HC-55021, and N01-HC-55022 from the
National Heart, Lung, and Blood Institute, Bethesda, MD. The authors
thank the staff and participants in the ARIC study for their important
contributions.
Reprint requests to Tien Yin Wong, MD, PhD, Department of
Ophthalmology, National University of Singapore, 10 Lower Kent Ridge
Road, Singapore 119074; fax: (+65)6777 7161; e-mail: ophwty@
nus.edu.sg
© 2002 BY ELSEVIER SCIENCE INC.ALL RIGHTS RESERVED. 828 0002-9394/02/$22.00
PII S0002-9394(02)01672-0