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Longitudinal relationships between pet ownership and cognitive functioning in later adulthood across pet types and individuals’ ages

Longitudinal relationships between pet ownership and cognitive functioning in later adulthood across pet types and individuals’ ages
  • Acharya, V. et al. Genome-wide meta‐analysis of age‐related cognitive decline in population‐based older individuals. Alzheimer’s Dement. 17 (2021).

  • Salthouse, T. When does age-related cognitive decline begin? Neurobiol. Aging. 30, 507–514. (2009).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Deary, I. et al. Age-associated cognitive decline. Br. Med. Bull. 92, 135–152. (2009).

    Article 
    PubMed 

    Google Scholar 

  • Franz, C. E. et al. Body mass trajectories and cortical thickness in middle-aged men: a 42-year longitudinal study starting in young adulthood. Neurobiol. Aging. 79, 11–21 (2019).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Harris, S. E. & Deary, I. J. The genetics of cognitive ability and cognitive ageing in healthy older people. Trends Cogn. Sci. 15 (9), 388–394. (2011).

    Article 
    PubMed 

    Google Scholar 

  • Livingston, G. et al. Dementia prevention, intervention, and care: 2024 report of the lancet standing commission. Lancet 404 (10452), 572–628. (2024).

    Article 
    PubMed 

    Google Scholar 

  • Zaninotto, P., Batty, G. D., Allerhand, M. & Deary, I. J. Cognitive function trajectories and their determinants in older people: 8 years of follow-up in the english longitudinal study of ageing. J. Epidemiol. Commun. Health. 72 (8), 685–694. (2018).

    Article 

    Google Scholar 

  • Roehr, S. et al. Subjective cognitive decline is longitudinally associated with lower health-related quality of life. Int. Psychogeriatr. 29, 1939–1950. (2017).

    Article 
    PubMed 

    Google Scholar 

  • Wilson, R. et al. The influence of cognitive decline on well-being in old age. Psychol. Aging. 28 (2), 304–313. (2013).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Seeher, K., Low, L., Reppermund, S. & Brodaty, H. Predictors and outcomes for caregivers of people with mild cognitive impairment: A systematic literature review. Alzheimer’s Dement. 9, 346–355. (2013).

    Article 

    Google Scholar 

  • Lenox-Smith, A., Reed, C., Lebrec, J., Belger, M. & Jones, R. Potential cost savings to be made by slowing cognitive decline in mild Alzheimer’s disease dementia using a model derived from the UK GERAS observational study. BMC Geriatr. 18 (2018).

  • Dominguez, L. et al. Nutrition, physical activity, and other lifestyle factors in the prevention of cognitive decline and dementia. Nutrients 13 (2021).

  • Marioni, R., Hout, A., Valenzuela, M., Brayne, C. & Matthews, F. Active cognitive lifestyle associates with cognitive recovery and a reduced risk of cognitive decline. J. Alzheimer’s Disease: JAD. 28 (1), 223–230. (2012).

    Article 

    Google Scholar 

  • Applebaum, J. W., Peek, C. W. & Zsembik, B. A. Examining US pet ownership using the general social survey. Social Sci. J. 60 (1), 110–119 (2023).

    Article 

    Google Scholar 

  • Bedford, E. Pet ownership in the US–Statistics & facts. (2021).

  • FEDIAF. Facts and figures. European review. (2020). Available from: https://www.nvg-diervoeding.nl/assets/files/fediaf-facts-and-figures-2020.pdf

  • Mueller, M. K., Gee, N. R. & Bures, R. M. Human–animal interaction as a social determinant of health: descriptive findings from the health and retirement study. BMC Public. Health. 18, 305. (2018).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Tan, J. S. Q. et al. Association between pet ownership and physical activity and mental health during the COVID-19 circuit breaker in Singapore. One Health (Amsterdam Netherlands). 13, 100343. (2021).

    Article 
    CAS 
    PubMed 

    Google Scholar 

  • Meier, C. & Maurer, J. Buddy or burden? Patterns, perceptions, and experiences of pet ownership among older adults in Switzerland. Eur. J. Ageing. 19 (4), 1201–1212. (2022).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Gee, N. R. & Mueller, M. K. A systematic review of research on pet ownership and animal interactions among older adults. Anthrozoös 32 (2), 183–207. (2019).

    Article 

    Google Scholar 

  • Hughes, M. J., Verreynne, M. L., Harpur, P. & Pachana, N. A. Companion animals and health in older populations: A systematic review. Clin. Gerontologist. 43 (4), 365–377 (2020).

    Article 

    Google Scholar 

  • Branson, S., Boss, L., Cron, S. & Kang, D. H. Examining differences between homebound older adult pet owners and non-pet owners in depression, systemic inflammation, and executive function. Anthrozoös 29 (2), 323–334 (2016).

    Article 

    Google Scholar 

  • Blondell, S., Hammersley-Mather, R. & Veerman, J. Does physical activity prevent cognitive decline and dementia? A systematic review and meta-analysis of longitudinal studies. BMC Public. Health. 14, 510–510. (2014).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Cardona, M. & Andrés, P. Are social isolation and loneliness associated with cognitive decline in ageing? Frontiers in Aging Neuroscience. 15. (2023). https://doi.org/10.3389/fnagi.2023.1075563

  • Wood, L., Giles-Corti, B. & Bulsara, M. The pet connection: pets as a conduit for social capital? Soc. Sci. Med. 61 (6), 1159–1173. (2005).

    Article 
    PubMed 

    Google Scholar 

  • Bolstad, C., Porter, B., Brown, C., Kennedy, R. & Nadorff, M. The relation between pet ownership, anxiety, and depressive symptoms in late life: propensity score matched analyses. Anthrozoös 34, 671–684. (2021).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Kuiper, J. et al. Social relationships and cognitive decline: a systematic review and meta-analysis of longitudinal cohort studies. Int. J. Epidemiol. 45 (4), 1169–1206. (2016).

    Article 
    PubMed 

    Google Scholar 

  • Gulpers, B. et al. Anxiety as a predictor for cognitive decline and dementia: A systematic review and Meta-Analysis. Am. J. Geriatric Psychiatry: Official J. Am. Association Geriatric Psychiatry. 24 (10), 823–842. (2016).

    Article 

    Google Scholar 

  • Polheber, J. & Matchock, R. The presence of a dog attenuates cortisol and heart rate in the Trier social stress test compared to human friends. J. Behav. Med. 37, 860–867. (2014).

    Article 
    PubMed 

    Google Scholar 

  • Allen, K., Shykoff, B. & Izzo, J. Pet ownership, but not ACE inhibitor therapy, blunts home blood pressure responses to mental stress. Hypertension: J. Am. Heart Association. 38, 815–820. (2001).

    Article 
    CAS 

    Google Scholar 

  • Levine, G. et al. Pet ownership and cardiovascular risk: A scientific statement from the American heart association. Circulation 127, 2353–2363. (2013).

    Article 
    PubMed 

    Google Scholar 

  • Franks, K., Bransby, L., Saling, M. & Pase, M. Association of stress with risk of dementia and mild cognitive impairment: A systematic review and Meta-Analysis. J. Alzheimer’s Disease: JAD. (2021).

    Article 
    PubMed 

    Google Scholar 

  • Skogen, J. C., Bergh, S., Stewart, R., Knudsen, A. K. & Bjerkeset, O. Midlife mental distress and risk for dementia up to 27 years later: the Nord-Trøndelag health study (HUNT) in linkage with a dementia registry in Norway. BMC Geriatr. 15, 1–10 (2015).

    Article 

    Google Scholar 

  • Ouanes, S. & Popp, J. High cortisol and the risk of dementia and Alzheimer’s disease: a review of the literature. Front. Aging Neurosci. 11, 43 (2019).

    Article 
    CAS 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Aggarwal, N. et al. Perceived stress and change in cognitive function among adults 65 years and older. Psychosom. Med. 76, 80–85. (2014).

    Article 
    PubMed 

    Google Scholar 

  • Turner, A., James, B., Capuano, A., Aggarwal, N. & Barnes, L. Perceived stress and cognitive decline in different cognitive domains in a cohort of older African Americans. Am. J. Geriatric Psychiatry: Official J. Am. Association Geriatric Psychiatry. 25 (1), 25–34. (2017).

    Article 

    Google Scholar 

  • Dickinson, W., Potter, G., Hybels, C., McQuoid, D. & Steffens, D. Change in stress and social support as predictors of cognitive decline in older adults with and without depression. Int. J. Geriatr. Psychiatry. 26. (2011).

  • McDonough, I., Erwin, H., Sin, N. & Allen, R. Pet ownership is associated with greater cognitive and brain health in a cross-sectional sample across the adult lifespan. Front. Aging Neurosci. 14. (2022).

  • Friedmann, E. et al. Pet ownership patterns and successful aging outcomes in community dwelling older adults. Front. Veterinary Sci. 7, 293. (2020).

    Article 

    Google Scholar 

  • Branson, S. & Cron, S. Pet caretaking and risk of mild cognitive impairment and dementia in older US adults. Anthrozoös 35 (2), 203–217 (2022).

    Article 

    Google Scholar 

  • Applebaum, J. W., Shieu, M. M., McDonald, S. E., Dunietz, G. L. & Braley, T. J. The impact of sustained ownership of a pet on cognitive health: A Population-Based study. J. Aging Health. 35 (3–4), 230–241. (2023).

    Article 
    PubMed 

    Google Scholar 

  • Li, Y. et al. Pet ownership, living alone, and cognitive decline among adults 50 years and older. JAMA Netw. Open. 6 (12), e2349241. (2023).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Friedmann, E. et al. Pet ownership and maintenance of cognitive function in community-residing older adults: evidence from the Baltimore longitudinal study of aging (BLSA). Sci. Rep. 13 (1), 14738. (2023).

    Article 
    ADS 
    CAS 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Kidd, A. & Kidd, R. Problems and benefits of bird ownership. Psychol. Rep. 83, 131–138. (1998).

    Article 

    Google Scholar 

  • Beck, A. M. & Katcher, A. H. Bird-human interaction. J. Association Avian Veterinarians. 3 (3), 152–153 (1989).

    Article 

    Google Scholar 

  • Anderson, P. A bird in the house: an anthropological perspective on companion parrots. Soc. Anim. 11 (4), 393–418 (2003).

    Article 

    Google Scholar 

  • Clements, H. et al. The effects of interacting with fish in aquariums on human health and well-being: A systematic review. PloS one. 14(7). (2019). https://doi.org/10.1371/journal.pone.0220524

  • Kidd, A. H. & Kidd, R. M. Benefits, problems, and characteristics of home aquarium owners. Psychol. Rep. 84 (3), 998–1004 (1999).

    Article 

    Google Scholar 

  • Langfield, J. & James, C. Fishy Tales: experiences of the occupation of keeping fish as pets. Br. J. Occup. Therapy. 72 (8), 349–356 (2009).

    Article 

    Google Scholar 

  • Bell, T., Sprague, B. & Ross, L. Longitudinal associations of pain and cognitive decline in community-dwelling older adults. Psychol. Aging. (2022).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Kronschnabl, J., Kneip, T., Weiss, L. & Bergmann, M. Bodyweight change and cognitive performance in the older population. PLoS ONE. 16. (2021).

  • Spira, A., Chen-Edinboro, L., Wu, M. & Yaffe, K. Impact of sleep on the risk of cognitive decline and dementia. Curr. Opin. Psychiatry. 27, 478–483. (2014).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Niu, J. et al. Sleep quality and cognitive decline in a community of older adults in Daqing City, China. Sleep Med. 17, 69–74. (2016).

    Article 
    PubMed 

    Google Scholar 

  • Joo, H., Joo, J., Kwon, J., Jang, B. & Park, E. Association between quality and duration of sleep and subjective cognitive decline: a cross-sectional study in South Korea. Sci. Rep. 11 (2021).

  • Marti, R. et al. Effects of contact with a dog on prefrontal brain activity: A controlled trial. PloS One. 17 (10), e0274833. (2022).

    Article 
    CAS 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Nagasawa, T., Ohta, M. & Uchiyama, H. Effects of the characteristic temperament of cats on the emotions and hemodynamic responses of humans. PloS One. 15 (6), e0235188. (2020).

    Article 
    CAS 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Wang, W. Mechanisms of pet engagement in the formation and strengthening of urban social support networks: A sociological investigation. SHS Web Conferences. (2023).

    Article 

    Google Scholar 

  • McNicholas, J. & Collis, G. Dogs as catalysts for social interactions: robustness of the effect. Br. J. Psychol. 91 (1), 61–70. (2000).

    Article 
    PubMed 

    Google Scholar 

  • Stammbach, K. B. & Turner, D. C. Understanding the human—Cat relationship: human social support or attachment. Anthrozoös 12 (3), 162–168. (1999).

    Article 

    Google Scholar 

  • Brooks, H., Rushton, K., Walker, S., Lovell, K. & Rogers, A. Ontological security and connectivity provided by pets: a study in the self-management of the everyday lives of people diagnosed with a long-term mental health condition. BMC Psychiatry. 16 (2016).

  • Nieforth, L. & O’Haire, M. The role of pets in managing uncertainty from COVID-19. Psychol. Trauma: Theory Res. Pract. Policy. (2020).

    Article 

    Google Scholar 

  • Sauter, J. et al. Interactional effects between relational and cognitive reserves on decline in executive functioning. J. Gerontol. B. (2020).

    Article 

    Google Scholar 

  • Mueller, M. K. et al. Demographic and contextual factors as moderators of the relationship between pet ownership and health. Health Psychol. Behav. Med. 9 (1), 701–723. (2021).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Börsch-Supan, A. et al. Data resource profile: the survey of health, ageing and retirement in Europe (SHARE). Int. J. Epidemiol. 42 (4), 992–1001. (2013).

    Article 
    PubMed 
    PubMed Central 

    Google Scholar 

  • Bergmann, M., Kneip, T., De Luca, G. & Scherpenzeel, A. Survey participation in the Survey of Health, Ageing and Retirement in Europe (SHARE), Wave 1–7. Based on Release 7.0.0. SHARE Working Paper Series: 41-2019. Munich: MEA, Max Planck Institute for Social Law and Social Policy. (2019).

  • Harris, S. & Dowson, J. Recall of a 10-word list in the assessment of dementia in the elderly. Br. J. Psychiatry. 141 (5), 524–527 (1982).

    Article 
    CAS 
    PubMed 

    Google Scholar 

  • Rosen, W. G. Verbal fluency in aging and dementia. J. Clin. Exp. Neuropsychol. 2 (2), 135–146 (1980).

    Article 

    Google Scholar 

  • Bates, D., Maechler, M., Bolker, B. & Walker, S. Fitting linear Mixed-Effects models using lme4. J. Stat. Softw. 67 (1), 1–48. (2015).

    Article 

    Google Scholar 

  • R Core Team. R: A Language and Environment for Statistical Computing. R Foundation for Statistical Computing, Vienna, Austria. (2023).

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