Figure 3.

Risk factors for severe COVID-19 among patients with SLE with a COVID-19 diagnosis. ¹Results of backward stepwise logistic regression; other candidate variables included other Elixhauser Comorbidity Index diagnoses (see online supplemental table 1), Medicare insurance (vs commercial), urban residence, COVID-19 diagnosis in Q2 2021 (vs Q2 2020), use of other SLE medications in the 6 months before COVID-19 diagnosis (azathioprine, belimumab, cyclosporine, hydroxychloroquine, leflunomide, methotrexate, mycophenolate, tacrolimus), interactions between vaccination and prior use of corticosteroids or rituximab, interactions between vaccination and select comorbidities (diabetes, hypertension, obesity, renal failure). Q, quarter; SLE, systemic lupus erythematosus.