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Relationship between socioeconomic status and incidence of out-of-hospital cardiac arrest is dependent on age
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0143-005X; 1470-2738
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Journal of epidemiology and community health, 2020, Vol. 7, No. 9, pp. 726-731
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JONSSON, Martin, LUNGMAN, Petter, HARKONEN, Juho, VAN NIEUWENHUISEN, Ben, MØLLER, Sidsel, RINGH, Mattias, NORDBERG, Per, Relationship between socioeconomic status and incidence of out-of-hospital cardiac arrest is dependent on age, Journal of epidemiology and community health, 2020, Vol. 7, No. 9, pp. 726-731 - https://hdl.handle.net/1814/68316
Abstract
The association between socioeconomic status (SES) and incidence of out-of-hospital cardiac arrest (OHCA) is not fully understood. The aim of this study was to see if area-level socioeconomic differences, measured in terms of area-level income and education, are associated with the incidence of OHCA, and if this relationship is dependent on age. We included OHCAs that occurred in Stockholm County between the 1st of January 2006 and the 31st of December 2017, the victims being confirmed residents (n=10 574). We linked the home address to a matching neighbourhood (base unit) via available socioeconomic and demographic information. Socioeconomic variables and incidence rates were assessed by using cross-sectional values at the end of each year. We used zero-inflated negative binomial regression to calculate incidence rate ratios (IRRs). Among 1349 areas with complete SES information, 10 503 OHCAs occurred between 2006 and 2017. The IRR in the highest versus the lowest SES area was 0.61 (0.50–0.75) among persons in the 0–44 age group. Among patients in the 45–64 age group, the corresponding IRR was 0.55 (0.47–0.65). The highest SES areas versus the lowest showed an IRR of 0.59 (0.50–0.70) in the 65–74 age group. In the two highest age groups, no significant association was seen (75–84 age group: 0.93 (0.80–1.08); 85+ age group: 1.05 (0.84–1.23)). Similar crude patterns were seen among both men and women. Areas characterised by high SES showed a significantly lower incidence of OHCA. This relationship was seen up to the age of 75, after which the relationship disappeared, suggesting a levelling effect.
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