Pets Create a Positive Effect on Cognitive Health

Owning a pet, like a dog or a cat, especially for five years or longer, may be linked to slower cognitive decline in older adults, according to a preliminary study presented at the American Academy of Neurology’s 74th Annual Meeting being held in person in Seattle, April 2 to 7, 2022 and virtually, April 24 to 26, 2022.

“Prior studies have suggested that the human-animal bond may have health benefits like decreasing blood pressure and stress,” said study author Tiffany Braley, MD, MS, of the University of Michigan Medical Center in Ann Arbor and a member of the American Academy of Neurology.

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‘A companion animal can also increase physical activity, which could benefit cognitive health.’

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The study looked at cognitive data from 1,369 older adults with an average age of 65 who had normal cognitive skills at the start of the study. A total of 53% owned pets, and 32% were long-term pet owners, defined as those who owned pets for five years or more.

Of study participants, 88% were white, 7% were Black, 2% were Hispanic and 3% were of another ethnicity or race.

Researchers used data from the Health and Retirement Study, a large study of Medicare beneficiaries. In that study, people were given multiple cognitive tests.

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Researchers used those cognitive tests to develop a composite cognitive score for each person, ranging from zero to 27. The composite score included common tests of subtraction, numeric counting, and word recall.

Researchers then used participants’ composite cognitive scores and estimated the associations between years of pet ownership and cognitive function.

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Over six years, cognitive scores decreased at a slower rate in pet owners. This difference was strongest among long-term pet owners.

Taking into account other factors known to affect cognitive function, the study showed that long-term pet owners, on average, had a cognitive composite score that was 1.2 points higher at six years compared to non-pet owners.

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Researchers also found that the cognitive benefits associated with longer pet ownership were stronger for Black adults, college-educated adults, and men. More research is needed to further explore the possible reasons for these associations.

A limitation of the study was that length of pet ownership was assessed only at a one-time point, so information regarding ongoing pet ownership was unavailable.

Source-Medindia