Abstract
ObjectivesEvidence suggests that some COVID-19 survivors experience a wide range of post-COVID-19 sequelae; however, the majority of studies were conducted before the emergence of the milder Omicron variant. We examined the post-acute risk of new-incident cardiovascular complications after SARS-CoV-2 infection in a multi-ethnic Asian population, during Omicron predominance. MethodsThis cohort study used national testing and healthcare claims databases in Singapore to build a cohort of individuals with confirmed SARS-CoV-2 infection during Omicron BA.1/2 transmission and a contemporaneous test-negative group. Participants in both groups were followed up for a median of 300 days. We estimated risks of new-incident cardiovascular complications using doubly robust competing-risks survival analysis. Risks were reported using two measures: hazard ratio and excess burden. ResultsWe included 375 903 test-positive, infected individuals (mean age 48 years) and 619 379 test-negative controls (mean age 47 years). The majority (97.5%, 366 593/375 903) of infected individuals had mild infection not requiring hospitalization. There was no overall increased risk of new-incident cardiovascular complications, (adjusted hazards ratio, aHR = 1.01 [0.97–1.07]) amongst COVID-19 survivors when compared against test-negatives. A modestly increased risk and excess burden of dysrhythmias amongst COVID-19 survivors (aHR = 1.09 [1.01–1.19]) was observed. Risk and burdens of new-incident cardiovascular complications predominantly accrued in hospitalized (aHR = 2.81 [2.26–3.50]) and severe COVID-19 cases (aHR = 5.52 [3.76–8.10]). DiscussionNo significantly increased overall risk of any cardiovascular complication was observed in the 300 days following COVID-19 infection during the Omicron-dominant period when compared against test-negatives, with the exception of a small increased occurrence of dysrhythmias.
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