Gender Differences in Admissions and In-Hospital Outcomes of Patients With Acute Coronary Syndromes During the Coronavirus Disease 2019 Pandemic

Abstract

Background The incidence of acute coronary syndromes (ACS) decreased during the coronavirus disease 2019 (COVID-19) pandemic. Few studies have investigated gender differences in ACS admissions and outcomes during pandemics and have presented divergent results. This study aimed to investigate the effect of the COVID-19 pandemic on male and female hospitalizations and in-hospital outcomes in patients presenting with ACS. Methodology We designed a retrograde, single-center trial gathering data for ACS hospitalizations during the lockdown (March 9, 2020, to April 30, 2020) compared with the same timeframe of 2019. ACS hospitalizations were subgrouped as ST-elevation myocardial infarction (STEMI), non-STEMI (NSTEMI), and unstable angina (UA). We calculated the incidence rate ratio (IRR) to compare all-ACS and subgroups for male and female hospitalizations and the risk ratio (RR) to compare overall male/female mortality. Results This study included 321 ACS patients (238 males, 83 females) during the COVID-19 lockdown and 550 patients (400 males, 150 females) during 2019. The IRRs of all-ACS/males/females were significantly lower during the COVID-19 period at 0.58 (95% confidence interval (CI) = 0.44-0.76), 0.59 (95% CI = 0.43-0.75), and 0.55 (95% CI = 0.37-0.74), respectively. The IRR for STEMI was significantly lower among females (0.59 (95% CI = 0.39-0.89)), but not among males (0.76 (95% CI = 0.55-1.08)) The IRR for NSTEMI was not significantly lower, meanwhile it was significantly lower for UA among both males and females. The overall ACS mortality increased during the COVID-19 period (7.4% vs. 3.4%; RR = 2.16 (95% CI = 1.20-3.89)). Important increase was found in males (7.45% vs. 2.5%; RR = 3.02 (95% CI = 1.42-6.44)), but not in females (7.2% vs. 6%; RR = 1.20 (95% CI = 0.44-3.27). Conclusions The admissions of ACS reduced similarly in males and females during the COVID-19 pandemic. The admissions of STEMI reduced predominantly in females. We identified a substantial increase in the overall ACS mortality, but predominantly in males, reducing the differences between males and females. Further studies are necessary to better understand the increase in male mortality during the pandemic.

Keywords: acute coronary syndromes; covid-19 pandemic; gender differences; hospitalizations; in-hospital outcomes.

Figure 1. Gender-related coronary syndrome admissions during the COVID-19 and control periods.

Male and female all-ACS, STEMI, non‐STEMI, and UA admissions during the COVID-19 period (red bars) and control period (blue bar) showing the percentage reduction and statistical significance. ACS: acute coronary syndrome; STEMI: ST‐segment elevation myocardial infarction; UA: unstable angina; COVID-19: coronavirus disease 2019

Figure 2. All/male/female ACS admissions difference percentage between the COVID-19 and control periods.

The weekly admission difference percentage between the lockdown and control periods was obtained for all-ACS, showing an important reduction in all/male/female admissions during the second to the fifth week of the study compared to the control period. ACS: acute coronary syndromes; COVID-19: coronavirus disease 2019