Table 1.

(a) Prevalence of anti-platelet (anti-PLTs) and anti-thrombopoietin (anti-TPO) autoantibodies in the sera of lupus patients; (b) post-thrombocytopenic sera do not display autoantibody activity against platelet antigens.

Antibody	Current	Non-thrombocytopenic	Post-thrombocytopenic	Total
(a)
Anti-PLTs	5/11 (45%)	6/14 (43%)	0/13 (0%)	11/38 (29%)
Anti-GpIIb/IIIa	3/11 (27%)	5/14 (36%)	0/13 (0%)	8/38 (21%)
Anti-GpIa/IIa	3/11 (27%)	4/14 (29%)	0/13 (0%)	7/38 (18%)
Anti-GpIb/IX	0/11 (0%)	2/14 (14%)	0/13 (0%)	2/38 (5%)
Two or more	1/11 (9%)	5/14 (36%)	0/13 (0%)	6/38 (16%)
Anti-HLA I	1/11 (9%)	2/14 (14%)	0/13 (23%)	3/38 (8%)
Anti-TPO	4/11 (36%)	6/14 (43%)	5/13 (38%)	15/38 (39%)
(b)	Frequency (%)	P-value
Post-thrombocytopenic versus thrombocytopenic	0/13 (0%) versus 5/11 (45%)	0·006
Post-thrombocytopenic versus non-thrombocytopenic	0/13 (0%) versus 6/14 (43%)	0·007