Table I.
Demographic and laboratory findings in patients at acute presentation
| Characteristic | MIS-C (n = 8) | FC (n = 14) | MIS-C–like (n = 3) |
|---|---|---|---|
| Demographics | |||
| Age (years), median (25th-75th percentile) | 9.5 (4.7-15.25) | 9.0 (2-14.5) | 4 (4-11) |
| Positive COVID-19 serology | 8/8 (100%) | 3/14 (21%) | 1/3 (33%) |
| Known recent COVID-19 exposure | 6/8 (75%) | 0 | 0 |
| Meets criteria for KD | 2/8 (25%) | 0 | 2/3 (66%) |
| Days of fever, median (25th/75th percentile) | 5.5 (4-7.25) | 5 (3-7) | 4 (3.5-9) |
| Laboratory findings | |||
| Platelet count (× 109 cells/L), median | 219 | 324 | 482 |
| Lymphocyte count (× 109 cells/L), median | 0.78 | 3.47 | 1.6 |
| Serum sodium (mEq/L), median | 134.5 | 138 | 135 |
| C-reactive protein (mg/L), median | 111.72 | 13.55 | 72.55 |
| N-terminal pro–B-type natriuretic peptide (ntBNP) peak (pg/mL), median (range) | 3318 (1075-34,875) | 75 (10.9-891.2) | 184.6 (12.4-8907) |
| Troponin peak (ng/L), median (range) | 27.5 (0-235) | 0 (0-22) | Not sampled |