Table 1 Characteristics of patients

Female gender

7 (58)

Age (years)

62.1 [49.3–71.6]

 Granulomatosis with polyangiitis

9 (75)

 Microscopic polyangiitis

3 (25)

Vasculitis flare as first manifestation of the disease

11 (92)

 Corticosteroids

2 (16)

 Immunosuppressants

6 (50)

 Pneumo-renal syndrome

9 (75)

 Respiratory SOFA component

3 [2–4]

 PaO₂/FiO₂ ratio

154 [61–386]

 PaCO₂ (mmHg)

35 [31–46]

Acute kidney injury requiring RRT

5 (42)

 Renal SOFA component

2 [1–4]

 Blood creatinine level (μmol/L)

222 [94–450]

 Roteinuria (g/24 h)

1.5 [1.5–3]

 Hemoglobin level (g/dL)

10.1 [8.2–10.7]

 Number of plasmapheresis courses

6 [4–7]

 Corticosteroids

12 (100)

 Immunosuppressants

12 (100)

 Invasive mechanical ventilation

5 (42)

ICU length of stay (days)^a

11 [7–15]

In-ICU mortality

1 (8)