Estimated probability of reacquiring aPL antibody after a thrombosis among those who became negative after the thrombosis
| aPL subtype | Number with thrombosis | Number negative after thrombosis | Number reacquiring a positive result | Estimated risk of reacquiring within 5 years (95% CI) |
| aCL IgG ≥20 | 33 | 31 (94%) | 17 (55%) | 60% (40% to 71%) |
| aCL IgM ≥20 | 35 | 33 (94%) | 14 (42%) | 37% (23% to 57%) |
| aCL IgA ≥20 | 8 | 6 (75%) | 1 (12.5%) | 17% (3% to 73%) |
| Confirmed lupus anticoagulant | 35 | 30 (86%) | 21 (70%) | 76% (57% to 91%) |
| Prethrombosis positive for any of above | 60 | 48 (80%) | 34 (71%) | 73% (59% to 86%) |