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Loneliness and cognitive function in the older adult: a systematic review

Published online by Cambridge University Press:  02 January 2015

Lisa Boss
Affiliation:
The University of Texas Health Science Center at Houston, 6901 Bertner, Houston TX 77030, Texas, USA
Duck-Hee Kang
Affiliation:
The University of Texas Health Science Center at Houston, 6901 Bertner, Houston TX 77030, Texas, USA
Sandy Branson
Affiliation:
The University of Texas Health Science Center at Houston, 6901 Bertner, Houston TX 77030, Texas, USA
Corresponding
E-mail address:

Abstract

Background:

Loneliness is a significant concern among the elderly, particularly in societies with rapid growth in aging populations. Loneliness may influence cognitive function, but the exact nature of the association between loneliness and cognitive function is poorly understood. The purpose of this systematic review was to synthesize current findings on the association between loneliness and cognitive function in older adults.

Method:

A comprehensive, electronic review of the literature was performed. Criteria for inclusion were original quantitative or qualitative research, report written in English, human participants with a mean age ≥ 60 years, and published from January 2000 through July 2013. The total number of studies included in this systematic review was ten.

Results:

Main findings from the ten studies largely indicate that loneliness is significantly and negatively correlated with cognitive function, specifically in domains of global cognitive function or general cognitive ability, intelligence quotient (IQ), processing speed, immediate recall, and delayed recall. However, some initial correlations were not significant after controlling for a wide range of demographic and psychosocial risk factors thought to influence loneliness.

Conclusions:

Greater loneliness is associated with lower cognitive function. Although preliminary evidence is promising, additional studies are necessary to determine the causality and biological mechanisms underlying the relationship between loneliness and cognitive function. Findings should be verified in culturally diverse populations in different ages and settings using biobehavioral approaches.

Type
Review Article
Copyright
Copyright © International Psychogeriatric Association 2015 

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