Demographic data
| Variable | SN-APS (n=67) | SP-APS (n=87) | p value |
|---|---|---|---|
| Age | 45.7 (9.3) | 46.1 (11.1) | 0.82 |
| Age first pregnancy event | 25.9 (5.7) | 27.8 (6.8) | 0.11 |
| Age first thrombotic event | 33.8 (11.5) | 36.7 (12.7) | 0.26 |
| Sex | |||
| Female | 66 (98.5%) | 80 (91.9%) | 0.13 |
| Race | |||
| Caucasian | 64 (95.5%) | 71 (81.%) | 0.34 |
| Primary vs secondary APS | <0.001 | ||
| Primary APS | 56 (83.5%) | 53 (60.9%) | |
| SLE-APS | 11 (16.4%) | 34 (39.1%) | |
| Clinical manifestations | |||
| Venous thrombosis | 27 (40.2%) | 40 (45.9%) | 0.51 |
| Arterial thrombosis | 23 (34.3%) | 30 (34.4%) | 0.98 |
| Pregnancy morbidity* | 55/64 (85.9%) | 54/69 (78.2%) | 0.26 |
Unless otherwise indicated, values represent number (SD).
↵* According to the Sydney classification criteria.
APS, antiphospholipid syndrome; SLE, systemic lupus erythematosus; SN-APS, the so-called seronegative APS; SP-APS, seropositive APS