Abstract: Objective: The aim of this study was to evaluate the frequency of systemic treatment in a cohort of sarcoidosis patients and identify presenting clinical features as predictive factors of the need for systemic immunosuppressive therapy. Methods: Retrospective study of 342 patients diagnosed and followed-up from January 1999 to December 2019 in a University Hospital in Northern Spain. The diagnosis of sarcoidosis was established according to ATS/ERS/WASOG criteria. A comparative analysis was performed between treated and untreated patients. Predictive factors of treatment prescription according to initial clinical manifestations were identified (multivariate analysis). Results: Mean age at diagnosis was 47.7±15.1 years, with a slight female predominance (51.8%) and Caucasian majority (94.2%). The main clinical manifestation was thoracic involvement (88.3%). Extrathoracic manifestations were detected in 68.4% cases, mainly cutaneous (34.2%), articular (27.8%) and ocular (17.8%). A total of 207 (60.5%) patients required systemic treatment. Glucocorticoid therapy was the most widely used (60.5%). Conventional immunosuppressive therapy in 25.4%, more frequently MTX (21.9%). Biologic therapy was prescribed in 12.9%, especially adalimumab (9.1%). Male gender (OR: 1.65; 95%CI: 1.06-2.56), intrathoracic (OR: 2.41; 95%CI: 1.22-4.76), ocular (OR: 4.14; 95%CI: 2.01-8.52), parotid (OR: 1.60; 95%CI: 1.39-1.94), neurological (OR: 5.00; 95%CI: 1.68-14.84), and renal (OR: 1.59; 95%CI: 1.38-1.94) involvement were identified as risk factors associated with the need of systemic treatment. Conclusion: Most patients (60.5%) of sarcoidosis in our series required systemic therapy. An association between certain characteristics at initial presentation (male gender, lung, ocular, parotid, neurological and renal involvement) and the need of systemic treatment was identified.

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