Can being single could raise risk for dementia?

real girl and her dog

A new study was released this week that suggests that if you have reached mid-life and are single, you are at risk for dementia – more so than your “hitched” friends. This is very bad news for me but it raises several questions.

How do we define midlife? It’s kind of relative, isn’t it? If you live to be 100 your mid life is higher than someone who lives to be 65. And how do you define single. Since I have two partners (Rebel and Lucky Dawg) keeping my company, I really don’t consider myself single.

Nevertheless, a new Scandinavian study found unmarried middle-aged people are more likely to develop cognitive impairment than their partnered counterparts. (I never trusted those Swedes.)

Before you head to the chapel to get hitched, consider a couple of caveats. Perhaps the association is the other way around, that those destined to have trouble thinking show symptoms decades before and therefore have trouble with relationships.

There’s even more to consider. Another study, this one from Israel, suggests that ruminating about life could actually protect your brain. If you’re alone, then, perhaps it would be a good idea to begin talking to yourself. Better yet, get a pet. They are fascinating listeners and don’t talk back or call you “silly.”

In the study of partnered and non-partnered people, said to be the first of its kind, Swedish researchers examined 1,449 Finnish people who were questioned in midlife and then again in 1998, an average of 21 years later.

Almost 10 percent of those in the study were diagnosed with some form of cognitive impairment in 1998.

Those who lived with a partner in midlife were less likely to be cognitively impaired than all the others (including those who were widowed, single, divorced or separated).

After the researchers adjusted their figures to take into account the effects of factors such as weight, physical activity and education, those with partners still had a 50 percent lower risk of showing signs of senility in later life compared to those who lived alone. Those who stayed single their whole lives had a doubled risk of dementia, while those who were divorced from midlife onward tripled their risk.

It’s not clear why being single is riskier for the brain. “Cognitive and intellectual stimulation has been reported to be protective against dementia in general,” said study author Krister Hakansson, of the Karolinska Institutet in Stockholm. “Living in a couple means that you are confronted with other ideas, perspectives and needs. You have to compromise, make decisions and solve problems together with someone else, which is more complicated and challenging. It is probably easier to get stuck in your own habits and routines if you live by yourself.”

But this theory only partially explains the results since those who were widowed and didn’t remarry had a much higher risk of dementia, Hakansson noted.

In the other study, Israeli researchers looked at about 9,000 participants in a multiple-year study of heart disease among male civil servants in Israel.

Those who reported that they were most likely to not “ruminate” about family difficulties in midlife were more likely to suffer from dementia in old age. More than one in five of those who ruminated the least had signs of senility, compared to 14 percent of those who “usually ruminate.”

Those who ruminated the most about work difficulties were also the least likely to suffer from dementia. So I guess the answer for single folks is to ruminate away to anyone who will listen.


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