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Posted: November 21, 2017

Dog owners less likely to die of heart attacks, study suggests

What Your Dog Is Really Trying To Tell You With Those Heart-Melting Eyes

By Jason Lemon, The Atlanta Journal-Constitution

Owning a dog could quite literally save your life, a new study has revealed.

>> Read more trending news

Dog owners who live alone have a 36 percent lower risk of death from cardiovascular disease than those without dogs. When it comes to dog owners who live with family members, the risk decreases by 15 percent.

"A very interesting finding in our study was that dog ownership was especially prominent as a protective factor in persons living alone, which is a group reported previously to be at higher risk of cardiovascular disease and death than those living in a multi-person household," Mwenya Mubanga, a study author and PhD student at Uppsala University in Sweden, told CNN.

» RELATED: This Texas woman’s heart literally broke when her dog died, doctors say

Published in “Scientific Reports,” the study was conducted by researchers in Sweden who examined medical and pet ownership records of 3.4 million people. Those analyzed by the study were between 40 and 80 years old. Participants were followed for up to 12 years, with around 13 percent owning pet dogs.

Researchers also noted that individuals who owned dogs originally bred for hunting, such as terriers, retrievers and scent hounds, saw even greater benefits. It's unclear exactly why this is, but researchers suggest that these breeds require more exercise, meaning the owner is necessarily more active and healthier.

» RELATED: Research shows why kids feel the loss of a pet so deeply

However, while the study clearly shows correlation between dog ownership and better heart health, it may not necessarily prove causation.

"These kind of epidemiological studies look for associations in large populations but do not provide answers on whether and how dogs could protect from cardiovascular disease," Tove Fall, a professor at Uppsala University and senior author of the study, told the BBC.

» RELATED: Research shows why kids feel the loss of a pet so deeply

"There might also be differences between owners and non-owners already before buying a dog, which could have influenced our results, such as those people choosing to get a dog tending to be more active and of better health."

At the same time, previous research has also pointed to the positive health benefits of owning dogs. For example, one study showed that children with dogs at home had a 15 percent reduced risk of asthma. Authors of that study suggested this was due to the "hygiene hypothesis," which posits that too clean of an environment actually increases an individual's susceptibility to allergies.

» RELATED: Sheriff: Toddler’s dog stayed with him while he was missing

In fact, the authors of the new study also said a possible reason for the positive effect of dogs on the heart may be connected to bacteria. According to the researchers, dogs actually change the dirt in their owners’ environment, meaning they may also influence their owner's bacterial microbiome. This collection of microscopic species lives in the gut and may benefit cardiovascular health.

But perhaps the biggest factor the research points to is the social aspect of owning a dog.

» RELATED: Ever wonder why dogs are so darn friendly? Science says it’s in their genes

"[Dog ownership] may encourage owners to improve their social life, and that in itself will reduce their stress level, which we know absolutely is a primary cause for cardiovascular disease and cardiac events," Dr. Rachel Bond, associate director of women's heart health at Lenox Hill Hospital in New York, told CNN.

And of course, dogs definitely increase an individual's overall happiness.

» RELATED: 7 dog hacks for pet parents in the city 

"As many dog owners may agree, the main reason for owning a dog is the sheer joy," Dr. Mike Knapton of the British Heart Foundation told BBC.

"Dog ownership has many benefits, and we may now be able to count better heart health as one of them,” she said.

» RELATED: Do people care more about suffering dogs than suffering humans?


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