Table 2. Correlations of adenosine diphosphate (ADP)-induced platelet reactivity by light transmission aggregometry (LTA), the VerifyNow P2Y₁₂ assay, and multiple electrode aggregometry (MEA) with ADP-induced P-selectin expression and activated glycoprotein (GP) IIb/IIIa.

	P-selectin		Activated GPIIb/IIIa
Platelet aggregation test	Correlation coefficient	p	Correlation coefficient	P
LTA	0.58	<0.001	0.58	<0.001
VerifyNow P2Y12 assay	0.66	<0.001	0.68	<0.001
MEA	0.33	<0.001	0.38	<0.001