Table 1. Underlying etiology of DAH.

Etiology	Number (%)
Idiopathic pulmonary hemosiderosis (IPH)	48 (64.9)
Miscellaneous causes	12 (16.2)
Sepsis	6
Pneumonia-induced acute respiratory distress syndrome (ARDS)	3
Enterovirus A71 (EV71) infection	1
Influenza B infection	1
Drowning	1
Immune-mediated disorders	7 (9.5)
Anti-neutrophil cytoplasmic antibody (ANCA) associated granulomatous vasculitis	3
Goodpasture syndrome	3
Evans syndrome	1
Liver dysfunction	4 (5.4)
Acute liver failure	3
Favism	1
Cardiovascular disorders	3 (4.1)
Heart failure	2
Vascular malformation	1