Table 1

Demographic data

VariableSN-APS (n=67)SP-APS (n=87)p value
Age45.7 (9.3)46.1 (11.1)0.82
 Age first pregnancy event25.9 (5.7)27.8 (6.8)0.11
 Age first thrombotic event33.8 (11.5)36.7 (12.7)0.26
Sex
 Female66 (98.5%)80 (91.9%)0.13
Race
 Caucasian64 (95.5%)71 (81.%)0.34
Primary vs secondary APS<0.001
 Primary APS56 (83.5%)53 (60.9%)
 SLE-APS11 (16.4%)34 (39.1%)
Clinical manifestations
 Venous thrombosis27 (40.2%)40 (45.9%)0.51
 Arterial thrombosis23 (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