Late-Life Social Activity and Cognitive Decline in Old Age

Rush Alzheimer's Disease Center, Chicago, Illinois 60612, USA.
Journal of the International Neuropsychological Society (Impact Factor: 2.96). 11/2011; 17(6):998-1005. DOI: 10.1017/S1355617711000531
Source: PubMed


We examined the association of social activity with cognitive decline in 1138 persons without dementia at baseline with a mean age of 79.6 (SD = 7.5) who were followed for up to 12 years (mean = 5.2; SD = 2.8). Using mixed models adjusted for age, sex, education, race, social network size, depression, chronic conditions, disability, neuroticism, extraversion, cognitive activity, and physical activity, more social activity was associated with less cognitive decline during average follow-up of 5.2 years (SD = 2.7). A one point increase in social activity score (range = 1-4.2; mean = 2.6; SD = 0.6) was associated with a 47% decrease in the rate of decline in global cognitive function (p < .001). The rate of global cognitive decline was reduced by an average of 70% in persons who were frequently socially active (score = 3.33, 90th percentile) compared to persons who were infrequently socially active (score = 1.83, 10th percentile). This association was similar across five domains of cognitive function. Sensitivity analyses revealed that individuals with the lowest levels of cognition or with mild cognitive impairment at baseline did not drive this relationship. These results confirm that more socially active older adults experience less cognitive decline in old age.

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    • "Besides the fundamental desire for companionship that every individual craves, there is a need for additional support and assistance during the later years of an individual's life in order to carry out certain tasks. Studies indicates that after controlling for other factors, the rate of cognitive decline may be reduced by up to 70% in persons who are frequently socially active compared to persons who are infrequently socially active (James, Wilson, Barnes, & Bennett, 2011). "
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