Association of leisure-time physical activity with cognition by apolipoprotein-E genotype in persons aged 60 years and over: the National Health and Nutrition Examination Survey (NHANES-III).
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Obisesan Thomas O, Umar Nisser, Paluvoi Nivedh, Gillum Richard
The apolipoprotein E e4 polymorphism is strongly associated with poor mobility performance test results but not self-reported limitation in older people.
The journals of gerontology. Series A, Biological sciences and medical sciences 2005 Oct 60 (10): 1319-23.
Melzer David, Dik M G, van Kamp Gerard J, Jonker Cees, Deeg Dorly