One data point has recently caused much astonishment, confusion and also anger online.

As Statista's Katharina Buchholz details below, it is the finding that men benefit more from being married in terms of life expectancy than women do.

In other words, that men live longer and healthier lives if they are backed up by a spouse in doing so, while women don’t see the same support in prolonging their length and quality of life.

The notion that men rob years of life from their wives and basically tag them on to theirs is, however, not supported by (most) research on the topic.

Yet, the differences in how men’s and women’s lives are affected by marriage or the lack thereof are still significant.

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In general, women tend to live longer and healthier lives than men for a variety of reasons, including greater health consciousness and a tendency to avoid risky behaviors, but also genetic and hormonal factors. A study published in 2020 in the Journal SSM – Population Health shows that at 65 years old, U.S. women were expected to live for an additional 19 to 21 years, while for U.S. men, this number only stood at around 16 to 18.5 years. Nevertheless, the devil is once again in the details and reveals itself when looking at the differences in sex and marital status.

Here, married men aged 65 gain almost 2.5 years of life expectancy over their unmarried counterparts of the same age, boosting their outlook on life significantly. The data shows how having a spouse brings the life expectancy of married men quite close to that of never-married women - quite significant if one considers how fundamental the longer life span of women has been across ages and cultures. Married and never-married women, on the other hand, have a more similar expected lifespan. However, marriage also benefits women and increases their life expectancy, if only by 1.8 years on average compared to never-married females.

Another study looking at Danish people at age 50 even shows that men benefited from an added life expectancy of around eight years through marriage, while married women could expect to live approximately five years longer compared to never-married women. This gave men an increase that was 60 percent bigger than that of women, compared to the 33 percent U.S. researchers found in 65-year-olds. A study in Asia even found benefits of marriage in reducing mortality only in men, but not in women, concluding that more traditional Asian marriages where female partners take on a lot of household and child-rearing chores on top of possible employment might cancel out any potential benefits.

The role women play in marriages as planners and facilitators of medical care as well as advocates for healthy habits becomes clear when looking at divorced and widowed men’s life expectancy. In the U.S., it falls to basically the same level as that of never-married men when considering 65-year-olds. In the case of U.S. women, the differences are again not that stark. Even if a women is divorced or widowed, her life expectancy is still somewhat above that of a never-married woman, highlighting how women benefit from the overall advantages of marriage rather than just their spouse. These come in the form of so-called marriage protections, like adopting better habits, better mental health outcomes and better social connectedness. They are also often explained by so-called marriage selection, the idea that those individuals who manage to get married are already starting out with a better outlook on life.

Newer research into these factors has added an important distinction to these theories, however. It finds that while overall, marriages tend to provide benefits to a majority of individuals, this doesn’t mean that every marriage is beneficial. A bad marriage or one that places a lot of additional burdens on both or one of the individuals involved can diminish the positive effects of marriage significantly. Likewise, smaller differences between the life expectancies of married, divorced, widowed and never-married women potentially mask a set of more diverse outcomes for women.

Where men’s benefits stemming from marriage seem more widespread and typical, women may still often find positive outcomes from a marriage that is going well for them, but many might also see minimal or even adverse effects, culminating in a less clear picture of marriage and female longevity.