Dietary patterns derived by hybrid clustering method in older people: association with cognition, mood, and self-rated health.
Journal of the American Dietetic Association. 2008-09-01; 108(9): 1461-1471
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1. J Am Diet Assoc. 2008 Sep;108(9):1461-71. doi: 10.1016/j.jada.2008.06.437.
Dietary patterns derived by hybrid clustering method in older people: association
with cognition, mood, and self-rated health.
Samieri C(1), Jutand MA, Féart C, Capuron L, Letenneur L, Barberger-Gateau P.
(1)INSERM, U897, University Victor Segalen Bordeaux 2, case 11, 146 rue
Léo-Saignat, F-33076 Bordeaux cedex, France.
BACKGROUND: Several nutritional factors, including dietary fatty acids,
antioxidants, and folates, have been related to pathological brain aging. Dietary
patterns that represent a combination of foods may better predict disease risk
than single foods or nutrients.
OBJECTIVE: To identify dietary patterns by a mixed clustering method and to
analyze their relationship with cognitive function, depressive symptoms, and
self-rated health in older people.
DESIGN: Cross-sectional population-based study.
SUBJECTS/SETTING: Subjects included 1,724 elderly community dwellers living in
Bordeaux, France from 2001 to 2002.
STATISTICAL ANALYSIS: Cluster analysis, combining hybrid clustering, and research
for stable groups during the k-means step on mean number of weekly servings of 20
predetermined food groups, separately in men and women.
RESULTS: Five dietary clusters were identified in each sex. A “healthy” cluster
characterized by higher consumption of fish in men (n=157; 24.3%) and fruits and
vegetables in women (n=267; 24.8%) had significantly lower mean number of errors
to Mini Mental State score after adjustment for socio-demographic variables
(beta=-0.11; 95% confidence interval [CI], -0.22 to -0.004 in men; beta=-0.13;
95% CI, -0.22 to -0.04 in women). The same cluster was associated with borderline
significance with lower depressive symptoms in women (beta=-0.16; 95% CI, -0.33
to 0.007). Men in the “pasta eaters” cluster (n=136; 21%) had higher depressive
symptoms (beta=0.26; 95% CI, 0.06 to 0.46) and higher risk to report poor health
(polytomous regression, odds ratio [OR]=1.91; 95% CI, 1.21 to 3.01) than the
“healthy” cluster. Women in the “biscuits and snacking” cluster (n=162; 15%) had
greater risk of poor perceived health (OR=1.69; 95% CI, 1.15 to 2.48) compared to
“healthy” eaters. Additional adjustment for body mass index and medication use
strengthened these associations.
CONCLUSIONS: Sex-specific dietary patterns derived by hybrid clustering method
are associated with fewer cognitive and depressive symptoms and better perceived
health in older people.
PMID: 18755318 [Indexed for MEDLINE]