GPA	Granulomatosis with Polyangiitis
ANCA	Anti-neutrophil Cytoplasmic Antibody
PR3	Proteinase 3
MPO	Myeloperoxidase
MPA	Microscopic Polyangiitis
EGPA	Eosinophilic Granulomatosis with Polyangiitis
AAV	ANCA-Associated Vasculitis
BVAS/WG	Birmingham Vasculitis Activity Score for Wegener’s Granulomatosis
IS	Immunosuppression/Immunosuppressive
CS	Corticosteroids
CYC	Cyclophosphamide
SGS	Subglottic stenosis
IV	Intravenous
HTN	Hypertension
DM	Diabetes Mellitus
cANCA	Cytoplasmic labeling pattern of Anti-neutrophil Cytoplasmic Antibodies
pANCA	Perinuclear labeling pattern of Anti-neutrophil Cytoplasmic Antibodies
T/S	Trimethoprim/Sulfamethoxazole
S. aureus	Staphylococcus aureus
STATISTICA PL	Statistical Software by StatSoft Poland, version 13
IQR	Interquartile Range