Table 2 Laboratory tests and treatment of patients with paediatric inflammatory multisystem syndrome temporally associated with SARS-CoV-2

Increased C-reactive protein—n/total n (%)

56/57 (98)

ESR ≥ 40 mm/h—n/total n (%)

47/50 (94)

Ferritin > 500 ng/ml—n/total n (%)

26/44 (59)

Aspartate aminotransferase ≥ 40 U/L—n/total n (%)

37/53 (70)

Alanine aminotransferase ≥ 40 U/L—n/total n (%)

36/53 (68)

Lactate dehydrogenase ≥ 300 U/L—n/total n (%)

24/44 (55)

Increased troponin n/total n (%)

8/49 (16)

Increased D-dimer n/total n (%)

45/47 (96)

Anemia (Hb < 11 g/dl)—n/total n (%)

45/57 (79)

Hemoglobin g/dl [median, (IQR)]

9.9 (8.3–10.8)

Leukocytosis (> 15.000 cells/mm³)—n/total n (%)

20/57 (35)

Leukopenia (< 4.000 cells/mm³)—n/total n (%)

7/57 (12)

Lymphopenia (< 1.500 cells/mm³)—n/total n (%)

41/57 (72)

Leukocytes/mm³ [median, (IQR)]

11.100 (7.480–21.100)

Neutrophils/mm³ [median, (IQR)]

8.300 (3.395–15.165)

Lymphocytes/mm³ [median, (IQR)]

1.001 (683–1.609)

Thrombocytosis (> 450.000 cells/mm³)—n/total n (%)

7/57 (12)

Thrombocytopenia (< 100.000 cells/mm³)—n/total n (%)

17/57 (30)

Platelets/mm³ [median, (IQR)]

126.000 (89.000–217.000)

RT-PCR (nasopharyngeal swab)—n/total n (%)

19/49 (39)

Serology

 IgG positive

32/45 (71)

 IgM positive

1/45 (2)

 IgG and IgM positive

5/45 (11)

RT-PCR positive and/or serology positive—n/total n (%)

44/57 (77)

Treatment

 Intravenous immunoglobulin + glucocorticoid n (%)

38/57 (67)

 Intravenous immunoglobulin n (%)

12/57 (21)

 Glucocorticoid n (%)

2/57 (3.5)