Remote Assessment of Platelet Function in Patients with Acute Stroke or Transient Ischaemic Attack

Table 2

P-selectin (median fluorescence) in response to arachidonic acid (AA, aspirin test) and adenosine diphosphate (ADP, clopidogrel test) by antiplatelet medication taken prior to randomisation, for aspirin versus no aspirin and clopidogrel versus no clopidogrel. Data are number (%) or mean (standard deviation, SD) with 95% confidence intervals. Comparisons by Chi-square test or one-way analysis of variance.

	No aspirin	Aspirin	Difference		No clopidogrel	Clopidogrel	Difference
AA
Number (%)	162 (24.1)	494 (20.4)			559 (20.2)	97 (29.5)
Mean (SD)	570 (435)	210 (188)	360.3	<0.001	261 (280)	515 (389)	−254.1	<0.001
<400 (%)	83 (51.2)	463 (93.7)	−42.5	<0.001	495 (88.6)	51 (52.6)	36	<0.001
<500 (%)	86 (53.1)	471 (95.3)	−42.3	<0.001	503 (90)	54 (55.7)	34.3	<0.001
ADP
Number (%)	165 (24.5)	517 (21.3)			585 (21.1)	97 (29.5)
Mean (SD)	854 (361)	947 (318)	−93.4	0.0015	969 (315)	655 (296)	314.5	<0.001
<860 (%) [33]	82 (49.7)	211 (40.8)	8.9	0.045	220 (37.6)	73 (75.3)	−37.7	<0.001
<625 (%)	48 (29.1)	77 (14.9)	14.2	<0.001	75 (12.8)	50 (51.5)	−38.7	<0.001
<500 (%)	30 (18.2)	38 (7.4)	10.8	<0.001	38 (6.5)	30 (30.9)	−24.4	<0.001