Table 1.

Haematological parameters of COVID-19 patients.

Parameter	Normal	Patient 1		Patient 2		Patient 3
		Day 31a	Day 38a	Day 11a	Day 18a	Day 14a
D-dimer, mg/L	<0.5	20.63	6.26	1.1	1.74	2.19
ESR, mm/h	0–20	135	125	>100	65	98
VWF:activity, %	42–168	520	405	374	303	352
VWF:antigen, %	42–136	555	413	329	251	396
FVIII:C, %	55–164	369	332	310	232	432
ADAMTS13 activity, %	>51	b	56	>100	83	81
ACA IgG, CU	<20.0	<2.6	<2.6	3.9	2.7	<2.6
ACA IgM, CU	<20.0	121.9	77.1	26.2	24.1	1.5
Anti-β2-GPI IgG, CU	<20.0	6.6	<6.4	<6.4	<6.4	<6.4
Anti-β2-GPI IgM, CU	<20.0	275.3	174.1	12.7	14.5	<1.1
Fibrinogen, g/L	2.00–3.93	5.11	5.82	6.45	3.48	4.33
Thrombocytes, 109/L	150–370	352	270	315	318	254
C-reactive protein, mg/L	<5	14.3	7.5	118	5.1	33.6

ESR, erythrocyte sedimentation rate; VWF, von Willebrand factor; FVIII:C, factor VIII clotting activity; ACA, anti-cardiolipin antibody; anti-β2-GPI, anti-β2 glycoprotein I antibodies.

^aRefers to days after onset of symptoms.

^bNot measured.