Table 3.

Results of thrombophilia testing during the acute phase

	Number of tests ordered during the acute phase	Number 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)	—	—	0
Prothrombin gene mutation	34	0 (0)	—	—	0
AT	34	6 (18)	4 (67)	0	2
PC	33	3 (9)	3 (100)	0	0
PS	33	9 (28)	5 (56)	1	4
LA	42	12 (29)	9 (75)	1	3
Anticardiolipin	44	1 (2)	0 (0)	0	1
aβ2GPI	43	7 (16)	4 (57)	1	3
Antiphosphatidylserine	30	2 (7)	0 (0)	0	2
Total	327	43 (13)	25 (63)‡	3	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.