Table 6. Kaplan-Meier estimates, unadjusted, & PS-stratified hazard ratios, stratified by clopidogrel or prasugrel use.

Outcome	Prasugrel (n=1,143)	Clopidogrel (n=8,648)	Unadjusted hazard ratio (95% CI)	p-value	PS-stratified hazard ratio*	p-value
							Death or MI	21 (2.1%)	223 (3.1%)	0.67 (0.43-1.05)	0.082	0.66 (0.38-1.13)	0.13
Death	9 (0.9%)	108 (1.5%)	0.59 (0.30-1.17)	0.133	0.57 (0.23-1.44)	0.236
Myocardial infarction	12 (1.2%)	104 (1.4%)	0.83 (0.45-1.50)	0.533	0.85 (0.44-1.67)	0.64
* Propensity score was generated using the following variables: age2, age, gender, BMI (kg/m2), current smoking status, hypertension, hyperlipidaemia, cerebrovascular disease, prior MI, prior CABG, LVEF, acute coronary syndrome, calcification-moderate/severe, chronic total occlusion, and complex PCI. Complex PCI is defined as having one of the following criteria: total stent length ≥60 mm, total number of stents ≥3, number of lesions ≥3, number of vessels ≥3, bifurcation with ≥2 stents, or chronic total occlusion. BMI: body mass index; CABG: coronary artery bypass graft; CI: confidence interval; LVEF: left ventricular ejection fraction; MI: myocardial infarction; PCI: percutaneous coronary intervention; PS: propensity score