Table 3.

Results of thrombophilia testing during the acute phase

Number of tests ordered during the acute phaseNumber of positive tests during the acute phase (% positivity)Number of positive tests repeated (% repeated)Number of confirmed positive tests*Number of potential false-positive diagnoses
FVL 34 3 (9) — — 
Prothrombin gene mutation 34 0 (0) — — 
AT 34 6 (18) 4 (67) 
PC 33 3 (9) 3 (100) 
PS 33 9 (28) 5 (56) 
LA 42 12 (29) 9 (75) 
Anticardiolipin 44 1 (2) 0 (0) 
aβ2GPI 43 7 (16) 4 (57) 
Antiphosphatidylserine 30 2 (7) 0 (0) 
Total 327 43 (13) 25 (63) 15 
Number of tests ordered during the acute phaseNumber of positive tests during the acute phase (% positivity)Number of positive tests repeated (% repeated)Number of confirmed positive tests*Number of potential false-positive diagnoses
FVL 34 3 (9) — — 
Prothrombin gene mutation 34 0 (0) — — 
AT 34 6 (18) 4 (67) 
PC 33 3 (9) 3 (100) 
PS 33 9 (28) 5 (56) 
LA 42 12 (29) 9 (75) 
Anticardiolipin 44 1 (2) 0 (0) 
aβ2GPI 43 7 (16) 4 (57) 
Antiphosphatidylserine 30 2 (7) 0 (0) 
Total 327 43 (13) 25 (63) 15 
*

Requires a persistently positive repeat test ≥12 wk apart or a single positive PCR assay.

All heterozygous.

The percentage of positive tests repeated excludes the 3 positive FVL PCR assays.

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