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Van Bogart K, Engeland CG, Sliwinski MJ, Harrington KD, Knight EL, Zhaoyang R, Scott SB, Graham-Engeland JE. The Association Between Loneliness and Inflammation: Findings From an Older Adult Sample. Front Behav Neurosci 2022; 15:801746. [PMID: 35087386 PMCID: PMC8787084 DOI: 10.3389/fnbeh.2021.801746] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 12/17/2021] [Indexed: 11/20/2022] Open
Abstract
Loneliness has been linked to poor mental and physical health outcomes. Past research suggests that inflammation is a potential pathway linking loneliness and health, but little is known about how loneliness assessed in daily life links with inflammation, or about linkages between loneliness and inflammation among older adults specifically. As part of a larger investigation, we examined the cross-sectional associations between loneliness and a panel of both basal and LPS-stimulated inflammatory markers. Participants were 222 socioeconomically and racially diverse older adults (aged 70-90 years; 38% Black; 13% Hispanic) systematically recruited from the Bronx, NY. Loneliness was measured in two ways, with a retrospective trait measure (the UCLA Three Item Loneliness Scale) and an aggregated momentary measure assessed via ecological momentary assessment (EMA) across 14 days. Inflammatory markers included both basal levels of C-reactive protein (CRP) and cytokines (IL-1β, IL-4, IL-6, IL-8, IL-10, TNF-α) and LPS-stimulated levels of the same cytokines. Multiple regression analyses controlled for age, body-mass index, race, and depressive symptoms. Moderation by gender and race were also explored. Both higher trait loneliness and aggregated momentary measures of loneliness were associated with higher levels of CRP (β = 0.16, p = 0.02; β = 0.15, p = 0.03, respectively). There were no significant associations between loneliness and basal or stimulated cytokines and neither gender nor race were significant moderators. Results extend prior research linking loneliness with systemic inflammation in several ways, including by examining this connection among a sample of older adults and using a measure of aggregated momentary loneliness.
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Affiliation(s)
- Karina Van Bogart
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA, United States
| | - Christopher G. Engeland
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA, United States
- Ross and Carol Nese College of Nursing, The Pennsylvania State University, University Park, PA, United States
| | - Martin J. Sliwinski
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, United States
- Center for Healthy Aging, The Pennsylvania State University, University Park, PA, United States
| | - Karra D. Harrington
- Center for Healthy Aging, The Pennsylvania State University, University Park, PA, United States
| | - Erik L. Knight
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, United States
| | - Ruixue Zhaoyang
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, United States
- Center for Healthy Aging, The Pennsylvania State University, University Park, PA, United States
| | - Stacey B. Scott
- Department of Psychology, Stony Brook University, Stony Brook, NY, United States
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