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J Gerontol B Psychol Sci Soc Sci. 2016 May;71(3):463-73. doi: 10.1093/geronb/gbu163. Epub 2014 Dec 6.

Social Disadvantage and Social Isolation Are Associated With a Higher Resting Heart Rate: Evidence From The Irish Longitudinal Study on Ageing.

Author information

1
The Irish Longitudinal Study on Ageing, Department of Medical Gerontology, Trinity College Dublin, Ireland. mccrorc@tcd.ie.
2
Department of Medical Physics and Bioengineering, Mercer's Institute for Successful Aging, St. James's Hospital, Dublin, Ireland.
3
The Irish Longitudinal Study on Ageing, Department of Medical Gerontology, Trinity College Dublin, Ireland.
4
Department of Sociology, Trinity College Dublin, Ireland.
5
Department of Epidemiology and Public Health, Western Gateway Building, University College Cork, Corcaigh, Ireland.

Abstract

OBJECTIVES:

A high resting heart rate (RHR) represents a major risk factor for cardiovascular disease and individuals from poorer backgrounds have a higher RHR compared with their more advantaged peers. This study investigates the pathways through which low socioeconomic status (SES) contributes to a higher RHR.

METHOD:

The sample involved data for 4,888 respondents who were participating in the first wave of The Irish Longitudinal Study on Ageing. Respondents completed a detailed interview at home and underwent a 5-min baseline electrocardiograph recording as part of a clinic-based health assessment. SES was indexed using household income.

RESULTS:

The mean difference in RHR between those at polarized ends of the income distribution was 2.80 beats per minute (bpm) (95% CI = 1.54, 4.06; p < .001), with the magnitude of the socioeconomic differential being greater for men (4.15 bpm; 95% CI = 2.18, 6.12; p < .001) compared with women (1.57 bpm; 95% CI = 0.04, 3.10; p < .05). Psychosocial factors including social network size and loneliness accounted for a sizeable proportion of the socioeconomic differential in RHR, particularly among men.

DISCUSSION:

The finding that poorer people have a higher RHR reinforces the need for additional research exploring the pathways through which social inequalities are translated into biological inequalities.

KEYWORDS:

IRISH cohort study; Loneliness; Resting heart rate; Social networks; Socioeconomic status

PMID:
25481923
DOI:
10.1093/geronb/gbu163
[Indexed for MEDLINE]

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