Characteristic COVID-19 MIS-C
Mild, N = 1171 Moderate, N = 381 (Very) severe, N = 101 p-value2 Mild, N = 431 Moderate, N = 141 (Very) severe, N = 411 p-value2

Age

 0.4 (0.1 - 7.9) 6.8 (0.6 - 13.6) 5.6 (0.6 - 15.4) 0.044 9.9 (6.4 - 11.6) 10.2 (6.5 - 14.3) 11.2 (9.0 - 14.1) 0.090

Gender

 0.8 0.084

Male

 70 (60%) 22 (58%) 5 (50%) 22 (51%) 7 (50%) 30 (73%)

Female

 46 (40%) 16 (42%) 5 (50%) 21 (49%) 7 (50%) 11 (27%)

BMI (z-score) 3

 -0.09 (-0.96 - 1.04) 0.62 (-0.32 - 1.50) 0.81 (-1.61 - 1.50) 0.2 0.11 (-0.85 - 0.81) 0.44 (-0.37 - 1.94) 0.40 (-0.40 - 1.32) 0.5

Hospital Admission

 88 (75%) 37 (97%) 10 (100%) 0.003 38 (88%) 14 (100%) 41 (100%) 0.034

Length of Stay (d)

 1 (1 - 3) 4 (3 - 8) 28 (9 - 56) <0.001 5.00 (4.00 - 8.00) 5.00 (3.00 - 9.00) 7.00 (6.00 - 8.00) 0.3

ICU admission

 2 (2.3%) 1 (2.8%) 10 (100%) <0.001 0 (0%) 14 (100%) 41 (100%) <0.001

Length of Stay ICU (d)

 4 (4 - 5) 3 (3 - 3) 8 (4 - 28) 0.2 — 2.0 (2.0 - 3.8) 4.0 (3.0 - 5.0) 0.002

Lymphocyte count available

 0.018 0.10

Yes

 60 (51%) 26 (68%) 9 (90%) 40 (93%) 13 (93%) 32 (78%)

No

 57 (49%) 12 (32%) 1 (10%) 3 (7.0%) 1 (7.1%) 9 (22%)

Lymphopenia

 32 (53%) 16 (62%) 6 (67%) 0.6 23 (57%) 7 (54%) 26 (81%) 0.066
3. Roede MJ & van Wieringen JC, bewerking TNO (1985) Growth diagrams 1980: Netherlands third nation-wide survey. Tijdschrift voor Sociale Gezondheidszorg, 63, 1-34.

1 Median (IQR); n (%)

2 Kruskal-Wallis rank sum test; Pearson's Chi-squared test