Table 1.

Frequencies of antiphospholipid antibodies and thrombotic events in various cohort of COVID‐19 patients

References	Setting	n ^a	Lupus anticoagulant positivity (%)	Anti‐cardiolipin antibodies positivity (%)			Anti‐β2GP1 antibodies positivity (%)			Thrombotic events (%)
References	Setting	n ^a	Lupus anticoagulant positivity (%)	IgG	IgM	IgA	IgG	IgM	IgA	Thrombotic events (%)
[1]	ICU	25	92	52	20	28	4	0	12	24
[22]	ICU	3	0	100	0	0	100	0	100	100
[6]	ICU	74	85	12						36.4
[2]	ICU	29	–	24.1	10.3	–	17.2	27.5	–	–
[3]	ICU	19	5.2	10.5	5.2	31.6	31.6	0	36.8	63.1
[13]	ICU	122	–	5.7	6.6	0	15.6	9	6.6	–
[8]	ICU	31	67.7	19.3	3.2	9.7	9.7	3.2	9.7	29.0
[7]	ICU	57	87.7	–	–	–	–	–	–	18
[4]	Mixed	79	2.5	5.1	2.5	21.5	15.2	1.3	24.0	31.6
[5]	Mixed	56	–	28.5	5.3	–	17.8	7.1	–	–
[11]	Mixed	172	–	4.7	23	3.5	2.9	5.2	4.1	–
[12]	MW	24	–	0	2	–	0	2	–	100
[10]	MW	45	11.1	2.2	2.2	–	4.4	4.4	–	–
[9]	–	34	91	–	–	–	–	–	–	5.7
[23]	–	56	45	10						–
Range		3–172	0–92	0–100	0–20	0–31.6	0–100	0–9	4.1–100	5.7–100

ICU, intensive care unit; IgA, A immunoglobulin; IgG, G immunoglobulin; IgM, M immunoglobulin; MW, medical ward; Ref, reference.

^{^a}

Number of patients.