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Table 2 Clinical and laboratory characteristics events at of acute TMA presentation in patients with and without ADAMTS13 deficiency

From: Lombardy diagnostic and therapeutic network of thrombotic microangiopathy

 

ADAMTS13 < 10%

(n = 36)

ADAMTS13 ≥ 10%

(n = 8)

Difference of proportions/

median difference

(95%CI), p-value

Clinical signs and symptoms

Systemic, n (%)

32 (89)

7 (87)

2 (− 25–28), 1

Hemorrhagic, n (%)

15 (42)

1 (13)

29 (− 6–65), 0.25

Neurological, n (%)

14 (39)

4 (50)

− 11 (− 57–35), 0.97

Renal, n (%)

4 (11)

3 (38)

− 27 (− 70–16), 0.19

Cardiovascular, n (%)

4 (11)

0 (0)

11 (− 7–29), 0.76

Laboratory assays

Platelet count, 109/l,

median (IQR)

14 (10–25)

43 (34–51)

− 27 (− 37–3), 0.02

Platelet count < 30 × 109/l,

n (%)

31 (86)

2 (25)

61 (21–100), 0.01

Hemoglobin, g/dl,

median (IQR)

8.5 (7.2–11.2)

7.6 (6.9–9.1)

0.9 (− 1.0–2.9), 0.35

LDH, IU/l,

median (IQR) a

1039 (832–1761)

1197 (836–1956)

− 113 (− 927–450), 0.67

Indirect bilirubin, mg/dl,

median (IQR) b

1.8 (1.2–2.9)

1.8(1.2–2.3)

0.2 (− 1.1–1.9), 0.79

Creatinine, mg/dl,

median (IQR) c

1.0 (0.8–1.3)

1.4 (0.8–2.0)

− 0.3 (− 0.9–0.3), 0.38

Creatinine < 2.26 mg/dl,

n (%)

30 (83)

7 (88)

− 5 (− 34–26), 1.00

eGFR, ml/min,

median (IQR) d

79 (53–107)

50 (30–107)

17 (− 28–55), 0.38

  1. Systemic symptoms/signs: fatigue, fever, headache, jaundice (defined as total bilirubin levels ≥ 2.5 mg/dl); neurological symptoms/signs: ischemic stroke, transient ischemic attack, seizures, cognitive status alterations, personality disorders, focal neurological signs; hemorrhagic symptoms/signs: skin bleeding (purpura, ecchymosis), mucosal bleeds (including epistaxis, hematuria, meno-metrorrhagia, gastrointestinal bleeding); cardiovascular symptoms/signs: acute coronary syndrome or myocardial infarction; renal symptoms/signs: acute renal failure
  2. aAvailable for 35 events with ADAMTS13 < 10% and 8 events with ADAMTS13 ≥ 10%
  3. bAvailable for 26 events with ADAMTS13 < 10% and 4 events with ADAMTS13 ≥ 10%
  4. cAvailable for 33 events with ADAMTS13 < 10% and 8 events with ADAMTS13 ≥ 10%
  5. dAvailable for 28 events with ADAMTS13 < 10% and 8 events with ADAMTS13 ≥ 10%