Table 1.

Timing and context used to determine appropriateness of testing

Assay	Acute Thrombosis	UFH	LMWH	Warfarin	DOAC	Within 2w of stopping VKA
Factor V Leiden	√	√	√	√	√
Prothrombin gene mutation	√	√	√	√	√
Protein C	?	?	?	X	X	X
Protein S	?	?	?	X	X	X
Antithrombin III	X	X	X	?	X
Lupus anticoagulant	√	X	X	?	Xa
dRVVT	√	√	√	?	X
Beta-2 glycoprotein 1 Ab	√	√	√	√	√
Anti-cardiolipin Ab	√	√	√	√	√
JAK2 mutation	√	√	√	√	√

^a False Positive