Impact of SARS-CoV-2 pre-delta/delta and omicron variants on clinical outcomes in a systemic lupus erythematosus cohort from Puerto Rico.

ObjectiveTo examine the clinical outcomes of systemic lupus erythematosus (SLE) patients with COVID-19 during the Pre-Delta/Delta and Omicron periods.MethodsA retrospective study was conducted in a cohort of adult Puerto Ricans with SLE. Demographic parameters, SLE and COVID-19 manifestations, comorbidities, pharmacologic treatment, SLE exacerbations, hospitalizations, and mortality were determined. SARS CoV-2 infection was confirmed by polymerase chain reaction or antigen tests. Variables were compared between the Pre-delta/Delta and Omicron periods. Also, the proportion of COVID-19 cases and mortality of SLE patients was compared to the general population of Puerto Rico.ResultsOf the entire SLE cohort (n = 347), 169 patients (48.7%) had COVID-19. Twenty-two patients had COVID-19 during the Pre-delta/Delta period and 147 during the Omicron period. The proportion of COVID-19 cases in the SLE cohort was significantly higher when compared to the adult general population of Puerto Rico (25.7%), but no difference in mortality was found. Overall, the clinical outcomes of COVID-19 in the SLE cohort were favorable, with low rates of lupus flares (3.0%), hospitalizations (3.6%), and mortality (0.6%). Patients with COVID-19 during the Pre-delta/Delta period were more likely to have oral ulcers, anti-Smith antibodies, and chronic kidney disease, whereas those during the Omicron period were more likely to have COVID-19 symptoms (rhinorrhea, sore throat, and cough).ConclusionIn summary, is this group of Puerto Ricans with SLE, a high proportion had COVID-19, but disease exacerbation, hospitalization, and mortality rates were low. Few clinical differences were noted in SLE patients when comparing the Pre-delta/Delta and Omicron periods.