Table 1 Participant demographics
|  | Discovery cohort (n = 109) | Validation cohort (n = 653) | Total enrolled (n = 762) |
|---|---|---|---|
Age years, mean (min,max) | 10 (1 month–21) | 10 (4 days–21) | 10 (4 days–21) |
Sex, n (%) | Â | ||
 Male | 63 (58) | 327 (50) | 390 (51) |
 Female | 46 (42) | 326 (50) | 372 (49) |
Race, n (%) | Â | ||
 White | 38 (35) | 361 (55) | 399 (52) |
 Black | 7 (6) | 165 (25) | 172 (23) |
 Asian | 8 (7) | 19 (3) | 27 (4) |
Ethnicity, n (%) | Â | ||
 Hispanic | 58 (53) | 173 (26) | 231 (30) |
Illness classification, n (%) | Â | ||
 MIS-C | 17 (16) | 40 (6) | 57 (8) |
 Infectious | 79 (72) | 456 (70) | 535 (70) |
 Non-infectious | 0 (0) | 83 (13) | 83 (11) |
 Healthy controls | 13 (9) | 74 (11) | 87 (11) |