Abstract
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. 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. 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. 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.
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More From: The journals of gerontology. Series B, Psychological sciences and social sciences
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