Impact of Socioeconomic Status on 30-Day and 1-Year Mortalities after Intensive Care Unit Admission in South Korea: A Retrospective Cohort Study
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Background: Socioeconomic status (SES) is closely associated with health outcomes, includingmortality in critically ill patients admitted to intensive care unit (ICU). However, research regardingthis issue is lacking, especially in countries where the National Health Insurance Systemis mainly responsible for health care. This study aimed to investigate how the SES of ICU patientsin South Korea is associated with mortality. Methods: This was a retrospective observational study of adult patients aged ≥20 years admittedto ICU. Associations between SES-related factors recorded at the time of ICU admission and30-day and 1-year mortalities were analyzed using univariable and multivariable Cox regressionanalyses. Results: A total of 6,008 patients were included. Of these, 394 (6.6%) died within 30 days ofICU admission, and 1,125 (18.7%) died within 1 year. Multivariable Cox regression analysisfound no significant associations between 30-day mortality after ICU admission and SESfactors (P>0.05). However, occupation was significantly associated with 1-year mortalityafter ICU admission. Conclusions: Our study shows that 30-day mortality after ICU admission is not associatedwith SES in the National Health Insurance coverage setting. However, occupation was associatedwith 1-year mortality after ICU admission.
Abstract
Background: Socioeconomic status (SES) is closely associated with health outcomes, includingmortality in critically ill patients admitted to intensive care unit (ICU). However, research regardingthis issue is lacking, especially in countries where the National Health Insurance Systemis mainly responsible for health care. This study aimed to investigate how the SES of ICU patientsin South Korea is associated with mortality. Methods: This was a retrospective observational study of adult patients aged ≥20 years admittedto ICU. Associations between SES-related factors recorded at the time of ICU admission and30-day and 1-year mortalities were analyzed using univariable and multivariable Cox regressionanalyses. Results: A total of 6,008 patients were included. Of these, 394 (6.6%) died within 30 days ofICU admission, and 1,125 (18.7%) died within 1 year. Multivariable Cox regression analysisfound no significant associations between 30-day mortality after ICU admission and SESfactors (P>0.05). However, occupation was significantly associated with 1-year mortalityafter ICU admission. Conclusions: Our study shows that 30-day mortality after ICU admission is not associatedwith SES in the National Health Insurance coverage setting. However, occupation was associatedwith 1-year mortality after ICU admission.
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