A single center survey study of systemic vasculitis and COVID-19 during the first months of pandemic.

Introduction: COVID-19 pandemic created concerns among patients receiving immunosuppressive therapy. Frequency of COVID-19 and impact of lockdown on treatment compliance in patients with vasculitis are largely unknown. Patients and method: Patients with ANCA-associated and large vessel vasculitis that have been followed-up in our clinic were contacted by phone and a questionnaire containing home isolation status, treatment adherence and history of COVID-19 between March 1st and June 30th, 2020 was applied. Results: The survey was applied to 103 patients (F/M: 59/44, mean age: 53.2 +/- 12.5). Thirty-three (32%) patients didn't attend at least one appointment; 98(95.1%) noted that they spent 3 months in home isolation. Five patients (4.8%) received immunosuppressives irregularly and 3(2.9%) developed symptoms due to undertreatment. Four (3.9%) patients admitted to hospital with a suspicion of COVID-19, but none of them had positive PCR or suggestive findings by imaging. COVID-19 was diagnosed in a patient with granulomatosis with polyangiitis during hospitalization for disease flare and she died despite treatment. Discussion: Frequency of COVID-19 was low in patients with vasculitis in our single center cohort. Although outpatient appointments were postponed in one-third of our patients, high compliance with treatment and isolation rules ensured patients with vasculitis overcome this period with minimal morbidity and mortality