Laboratory findings in patients with MAS and COVID-19
| Laboratory findings | MAS | COVID-19 | P value |
| CRP, mean±SD (mg/L) | 129.74±26.58 | 111.937±14.24 | 0.564 |
| Ferritin, mean±SD (ng/mL) | 4888.83±1131.49 | 1207.17±171.66 | 0.010 |
| Red blood cells, mean±SD (103/mL) | 4.01±0.28 | 4.58±0.23 | 0.092 |
| Haemoglobin, mean±SD, (g/dL) | 9.5±1.8 | 12.5±2.1 | <0.0001 |
| Platelets, mean±SD (109/L) | 121.90±36.34 | 254.53±19.51 | 0.043 |
| Neutrophils, mean±SD (103/mL) | 4.08±0.55 | 8.98±2.32 | 0.044 |
| Lymphocytes, mean±SD (103/mL) | 2.61±0.58 | 1.02±0.09 | 0.005 |
| Monocytes, mean±SD (103/mL) | 0.32±0.09 | 0.55±0.05 | 0.063 |
| D-dimer>4 ng/mL, n (%) | 4 (40%) | 10 (21.27%) | 0.076 |
| D-dimer, mean±SD (ng/mL) | 3.2±0.9 | 2.9±1.4 | 0.069 |
| Fibrinogen, mean±SD (mg/dL) | 386.6±121.4 | 533.4±177.9 | 0.031 |
| aPTT, mean±SD (s) | 37.7±2.2 | 33.8±4.9 | 0.020 |
| INR, mean±SD | 1.7±1.1 | 1.2±0.5 | 0.206 |
| AST, mean±SD, IU/L | 148.8±75.2 | 34.7±13.1 | 0.002 |
| ALT, mean±SD (IU/L) | 178.9±77.4 | 42.4±14.8 | 0.001 |
| CK, mean±SD (IU/L) | 105.2±58.9 | 133.3±51.9 | 0.605 |
| Albumin, mean±SD (g/dL) | 2.97±0.7 | 3.25±0.8 | 0.351 |
| BNP, mean±SD (pg/mL) | 100.9±40.1 | 170.3±65.2 | 0.585 |
| Troponin I, mean±SD (ng/L) | 11.8±3.2 | 24.11±11.9 | 0.164 |
Bolded values indicate statistically significant results.
ALT, alanine aminotransferase; aPTT, activated partial thromboplastin time; AST, aspartate aminotransferase; BNP, brain natriuretic peptide; CK, creatine kinase; COVID-19, coronavirus disease 2019; CRP, C reactive protein; INR, international normalised ratio; MAS, macrophage activation syndrome.