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Background and Objectives Positive associations between social connection/engagement and cognitive function are well documented. However, little is known about whether social connection/engagement can buffer the impact of serious brain injury such as stroke on cognitive functioning. Research Design and Methods Participants were 898 individuals with incident stroke from the Health and Retirement Study between 1998 and 2012. Multilevel modeling was used to examine how social connection/engagement was associated with episodic memory pre- and poststroke. Models controlled for age, gender, education, race/ethnicity, number of health conditions, and functional health. Results Participants who were lonely prestroke recalled significantly fewer words at the time of stroke, and participants who had children residing within 10 miles prestroke showed significantly less decline in word recall over time. Participants who provided help to others prestroke showed less stroke-related decline in word recall. Within-person increase in partnered status, having friends, and helping others were related to better word recall in the poststroke period. Discussion and Implications Higher prestroke levels of social connection/engagement predicted better episodic memory at stroke, a smaller decline in episodic memory with stroke, and less decline in episodic memory over time. Increases in social connection/engagement from pre- to poststroke also predicted better poststroke episodic memory. Beyond the widely documented benefits of social connection/engagement to well-being, they may also increase cognitive stimulation and cognitive reserve and thus contribute to stroke recovery in the cognitive domain. Social connection/engagement is an important and modifiable risk factor in older adults.

The Role of Social Connection/Engagement in Episodic Memory Change in Stroke