Time from thrombosis to first negative aPL antibody
| Time since thrombosis | IgG (n=31) | IgM (n=33) | IgA (n=6) | Lupus anticoagulant (n=30) | Any of the four aPLs (n=48) |
| <1 year | 29 (94%) | 31 (94%) | 4 (67%) | 19 (63%) | 34 (71%) |
| 1–3 years | 2 (6%) | 2 (6%) | 1 (17%) | 6 (20%) | 7 (15%) |
| >3 years | 0 (0%) | 0 (0%) | 1 (17%) | 5 (17%) | 7 (15%) |
aCL, anticardiolipin; aPL, antiphospholipid.