Table 3 Association between aspirin resistance by arachidonic acid aggregation and aspirin non-response by PFA-100 testing in 172 patients (visit 1)

	AA aggregation resistant (%)	AA aggregation sensitive (%)	Total (%)
PFA-100 resistant	1 (33.3)	37 (21.9)	38 (22.1)
PFA-100 sensitive	2 (66.7)	132 (78.1)	134 (77.9)
Total	3 (100.0)	169 (100.0)	172 (100.0)

AA, arachidonic acid; PFA-100, platelet function analyser-100.
Coefficient of agreement between methods, κ = 0.02.