Being more socially active in your 50s and 60s predicts a lower risk of developing dementia later on, according to a new study.
“Dementia is a major global health challenge, with 1 million people expected to have dementia in the UK by 2021, but we also know that one in three cases are potentially preventable,” said the study’s lead author, Dr. Andrew Sommerlad of University College London.
“Here we’ve found that social contact, in middle age and late life, appears to lower the risk of dementia,” he continued. “This finding could feed into strategies to reduce everyone’s risk of developing dementia, adding yet another reason to promote connected communities and find ways to reduce isolation and loneliness.”
For the study, researchers used data from the Whitehall II study, tracking 10,228 participants who had been asked on six occasions between 1985 and 2013 about their frequency of social contact with friends and relatives. The same participants also completed cognitive testing from 1997 onwards. Researchers referred to the participants’ electronic health records up until 2017 to see if they were ever diagnosed with dementia.
The researchers report they focused on the relationships between social contact at age 50, 60, and 70, and the subsequent incidence of dementia. They noted they also looked at whether social contact was linked to cognitive decline, after accounting for other factors, such as education, employment, marital status, and socioeconomic status.
The researchers found that increased social contact at age 60 is associated with a significantly lower risk of developing dementia later in life. The analysis showed that someone who saw friends almost daily at age 60 was 12 percent less likely to develop dementia than someone who only saw one or two friends every few months.
They also found similarly strong associations between social contact at ages 50 and 70 and subsequent dementia. Those associations did not reach statistical significance, but the researchers say that social contact at any age may well have a similar impact on reducing dementia risk.
According to the researchers, there are a few explanations for how social contact could reduce dementia risk.
“People who are socially engaged are exercising cognitive skills, such as memory and language, which may help them to develop cognitive reserve. While it may not stop their brains from changing, cognitive reserve could help people cope better with the effects of age and delay any symptoms of dementia,” said senior author Professor Gill Livingston.
“Spending more time with friends could also be good for mental wellbeing, and may correlate with being physically active, both of which can also reduce the risk of developing dementia,” he added.
The study was published in PLOS Medicine.
Source: University College London