Table 4.

Frequency of abnormal results across groups

No. (%)
PVIAISControl
PT1 (2)4 (5)1 (1)
INR01 (1)0
PTT4 (8)6 (8)3 (4)
Fibrinogen01 (1)0
Antithrombin01 (1)1 (1)
Protein C5 (10)7 (9)10 (14)
Protein S9 (18)9 (12)10 (14)
Protein S free9 (17)12 (16)18 (24)
Factor VIII4 (8)4 (6)5 (7)
Factor IX000
Factor XI3 (6)8 (11)12 (16)
Lp(a)000
Anticardiolipin antibody*5 (10)7 (10)2 (3)
Lupus inhibitor001 (1)
  • Using the established normative values and direction of abnormality favoring thrombophilia, the proportion of participants with abnormal results are shown. No differences were observed between groups, including individual analysis of NAIS and APPIS populations.

  • INR, international normalized ratio; PT prothrombin time; PTT partial thromboplastin time.

  • * Anticardiolipin results shown are from the original test and were normal on repeat testing in 86%.