The impact and outcome of COVID-19 on systemic sclerosis patients from the european scleroderma trial and research group (EUSTAR)

ABSTRACT

Background: Coronavirus disease-19 (COVID-19) has been a major clinical challenge worldwide. Sex, age and comorbidities have been associated with worse outcome in the general population. Systemic sclerosis (SSc) is a severe, autoimmune disease with frequent multi-organ involvement. Objectives: To assess the impact of COVID-19 and to determine factors associated with worse outcome in SSc patients from the European Scleroderma Trial and Research (EUSTAR) database. Methods: SSc patients from the EUSTAR database with COVID-19 were prospectively collected between 15.03.-31.12.2020. Two outcomes were chosen (1) hospitalization;and (2) severe outcome defined as either non-invasive ventilation, mechanical ventilation/extracorporeal membrane oxygenation (ECMO) or death. General risk factors assessed were sex, age and number of comorbidities. SSc related risk factors were SSc subtype, autoantibodies, disease duration, SSc associated organ manifestations including interstitial lung disease (ILD), pulmonary arterial hypertension (PAH), cardiac, gastrointestinal (GI), and musculoskeletal involvement;digital ulcers (DU), CRP at last visit, renal disease (scleroderma renal crisis and SSc associated renal insufficiency), modified Rodnan skin score (mRSS) and immunosuppressive treatment. Descriptive statistics and logistic regression models were applied. Results: In total, 178 European SSc patients with COVID-19 were registered with a median observation time of 5.5 weeks (Table 1). 95 patients (53%) could recall SAR-Cov-2 contact, while 47 (26%) had no contact. 156 (88%) were symptomatic at COVID-19 onset with fever, cough, malaise and dyspnea being most prevalent. Over the disease course, 63 (36%) developed pneumonia. In total, 67/176 (38%) were hospitalized which were in 84% due to COVID-19. 41/170 (24%) had a severe outcome including 21 (12%) deaths. 128 (72%) recovered completely, while 14 (8%) complained of sequela, with 7 (50%) stating respiratory complications. Age, non-SSc comorbidities, presence of ILD, PAH and SSc associated renal or cardiac disease were numerically associated with hospitalization and severe outcome (Table 1). Univariable logistic analyses for hospitalization and severe outcome are shown in Figure 1. In multivariable logistic regression, age (OR 1.03, 95%CI 1.01-1.07, p=0.019), presence of non-SSc comorbidities (OR 2.52, 95%CI 1.16-5.47, p=0.019) and SSc-related renal disease (predicting success perfectly) were associated with hospitalization and for severe outcome age (OR 1.05, 95%CI 1.01-1.08). Conclusion: SSc patients at older age, with non-SSc comorbidities, SSc related renal disease or ILD are at risk of a more severe outcome and should follow precautions to avoid COVID-19 infections and need careful monitoring in case of COVID-19.