Characteristic N Patient characteristics by clinical syndrome p-value2
Overall, N = 6671 COVID-19 with respiratory symptoms, N = 2651 Non-specific signs and symptoms attributed to COVID-19, N = 1521 MIS-C, N = 1871 Screening and/or symptoms not attributed to COVID-19, N = 631

Age

 665 3.4 (0.2 - 11.2) 0.6 (0.1 - 7.7) 0.2 (0.1 - 4.7) 10.0 (6.5 - 12.0) 5.9 (1.3 - 12.3) <0.001

Gender

 661 0.041
    

Male

 362 (55%) 132 (51%) 82 (54%) 118 (63%) 30 (48%)
    

Female

 299 (45%) 128 (49%) 69 (46%) 69 (37%) 33 (52%)

BMI (z-score) 3

 397 -0.08 (-1.02 - 1.01) -0.09 (-0.97 - 1.01) -0.39 (-1.72 - 0.92) 0.05 (-0.82 - 0.96) 0.04 (-0.92 - 1.05) 0.3

Hospital Admission

 657 595 (91%) 224 (86%) 130 (87%) 182 (98%) 59 (94%) <0.001

Length of Stay (d)

 587 3 (1 - 6) 2 (1 - 5) 2 (1 - 3) 5 (4 - 7) 4 (1 - 8) <0.001

ICU admission

 591 135 (23%) 23 (10%) 8 (6.2%) 98 (54%) 6 (10%) <0.001

Length of Stay ICU (d)

 133 4 (2 - 6) 10 (6 - 31) 3 (3 - 10) 3 (2 - 5) 1 (1 - 16) <0.001

Lymphocyte count available

 667 <0.001
    

Yes

 407 (61%) 120 (45%) 83 (55%) 168 (90%) 36 (57%)
    

No

 260 (39%) 145 (55%) 69 (45%) 19 (10%) 27 (43%)

Lymphopenia

 407 243 (60%) 61 (51%) 55 (66%) 111 (66%) 16 (44%) 0.008
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