Being alone isn’t necessarily a problem. Sometimes, it’s the whole point. An evening without plans, small talk, or anyone asking you for something? Lovely. Feeling like you have no one to turn to, though, is a different story.
A new study from Tulane University puts some numbers behind that distinction — and they’re pretty bleak. Researchers found that people experiencing both loneliness and social isolation could expect fewer years free from depression and anxiety after age 50. For men, the difference was nearly 6 years. For women, it was 3.7 years.
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The study analyzed 277,489 adults aged 40 to 69 who started out without seven major conditions, including heart disease, cancer, depression, and anxiety. Researchers estimated how many disease-free years participants could expect after age 50.
To be clear, this doesn’t mean enjoying your own company is shaving years off your life. It also doesn’t mean loneliness comes with a six-year countdown. These findings describe an association across a large group of people, not a prediction for any one person. But they do suggest that connection deserves a little more attention in conversations about health.
The Difference Between Being Alone and Being Lonely
We tend to use loneliness and social isolation interchangeably. Researchers don’t.
Social isolation is about the connections you have, or don’t have. Loneliness is about whether those connections feel satisfying or fulfilling. You can have people around you and still feel disconnected. Having company and feeling understood aren’t the same thing.
Compared with participants who experienced neither loneliness nor social isolation, women experiencing both had an estimated 2.4 fewer years free from major physical diseases. For men, the difference was 1.7 years. The mental-health differences were larger: approximately 3.7 years for women and 5.8 for men.
“Overall, the study found that social isolation and loneliness can have a significant impact on disease-free life expectancy,” lead author Lu Qi said in the university’s account of the research. “This includes both physical and mental disease.”
Why ‘Healthy Habits’ Aren’t the Whole Answer
Healthier habits, including a better diet, regular exercise, sufficient sleep, and not smoking, reduced the loss of disease-free years associated with social isolation. For loneliness, researchers didn’t find the same statistically significant benefit.
Even so, this was an observational study. It can’t prove that loneliness caused those differences or that changing your social life would give those years back. Researchers plan to investigate that through clinical trials and studies of other populations.
The takeaway isn’t that we all need more plans. (Please, no.) It’s that feeling connected deserves a place in the health conversation.
