Can Pet Ownership Ward Off Cognitive Decline?

TOPLINE:

Pet ownership is associated with slower cognitive decline in seniors who live alone, a new longitudinal cohort study showed. Investigators note the findings are important because previous research suggests older adults who live alone are at higher risk for dementia.

METHODOLOGY:

• Investigators analyzed data on 7945 participants aged 50 years and older (56% female; mean age, 66 years) from the English Longitudinal Study of Ageing (ELSA) and determined whether they lived alone or had a pet.
• Every couple of years for the next 8 years after baseline, participants were assessed for verbal cognition, verbal memory, and verbal fluency. Information about covariates including age, sex, employment status, educational level, and health was also collected.
• 35% of participants were pet owners, and 27% lived alone.

TAKEAWAY:

• Pet owners who lived alone had a slower rate of decline in verbal cognition (P = .009), verbal memory (P = .04), and verbal fluency (P = .03) compared with those without pets who lived alone.
• Stratified analysis showed that pet ownership was associated with slower rates of decline in composite verbal cognition, verbal memory, and verbal fluency but only among those who lived alone (all P < .001).
• There was no significant difference in rates of decline in composite verbal cognition, verbal memory, or verbal fluency between pet owners living alone and pet owners living with others.

IN PRACTICE:

“Pet ownership completely offset the associations of living alone with declining rates in verbal memory, verbal fluency, and composite verbal cognition. Our findings provide innovative insights for developing public health policies to slow cognitive decline in older adults living alone,” the authors wrote.

SOURCE:

Ciyong Lu, PhD, of Sun Yat-sen University in Guangzhou, China, led the study, which was published online on December 26, 2023, in JAMA Network Open.

LIMITATIONS:

Whereas cognitive function includes multiple components, the study only assessed verbal memory and verbal fluency. Also, the study did not gather information on the duration of pet ownership after baseline.

DISCLOSURES:

The investigators reported no disclosures.

A version of this article appeared on Medscape.com.