Table 1. Main characteristics of studies included on platelet activity tests in the meta-analysis.

First author	year	ethnicity	population studied	treatment protocal	definition of case	case			control			HWE
						CC	CT	TT	CC	CT	TT
Spiewak, M. [10]	2009	NA	ACS treated with PCI	LD aspirin 300 mg clopidogrel (300 mg or 600 mg)MD aspirin 75 mg clopidogrel 75 mg qd	collagen/adenosine diphosphate (CADP)-CT<130s	4	16	10	23	34	11	0.791
Kim, I. S. [12]	2012	Asian	Patients treated with PCI	cilostazol 100 mg bid, clopidogrel 75 mg and aspirin 200 mg qd	5 mol/l ADP-induced maximal PR (Aggmax)>46%.	7	4	1	45	58	12	0.287
Jeong, Y. H. [13]	2010	Asian	AMI treated with coron ary angiography or PCI	MD clopidogrel 150 mg aspirin 200 mg qd	5 mol/l ADP-induced maximal PR (PRmax)>50%.	13	14a		56b	55b	15b	0.791
Jeong, Y.H. [14]	2011	Asian	AMI treated with PCI	LD aspirin 300 mg clopidogrel 600 mgMD aspirin 100–200 mg clopidogrel 75 mg	20 mol/L ADP-induced maximal PR(PRmax)>59%	64	54	16	60	54	18	0.303

LD: loading dose; MD: maintenance dose; HWE: Hardy-Weinberg equilibrium.

^athe number is consisted of CT and TT.

^bthe number is consisted of case group and control group.