Corticosteroids for Acute and Recurrent Idiopathic Pericarditis: Unexpected Evidences

Table 1

Etiology of acute pericarditis in the overall study population.

Etiology	Incidence
Idiopathic, n (%)	276 (88.2)
Secondary	37 (11.8)
Infective, n (%)	2 (0.6)
Autoimmune, n (%)	7 (2.2)
SLE, n (%)	3 (1)
Undifferentiated connectivitis, n (%)	2 (0.6)
Still disease, n (%)	1 (0.3)
Horton disease, n (%)	1 (0.3)
Neoplastic, n (%)	15 (4.8)
Lung, n (%)	5 (1.6)
Lymphoma, n (%)	3 (1)
Melanoma, n (%)	3 (1)
Breast, n (%)	2 (0.6)
Myeloma, n (%)	1 (0.3)
Gastric, n (%)	1 (0.3)
ESRD, n (%)	2 (0.6)
Post-surgery, n (%)	8 (2.6)
Post-trauma, n (%)	3 (1)

Values are n (%). SLE indicates systemic erythematous lupus; ESRD, end-stage renal disease.