Comparison of 6-Month and Prolonged Dual Antiplatelet Therapy after Percutaneous Coronary Intervention with Biodegradable Polymer Everolimus-Eluting Stent

Table 2

Baseline characteristics of the matched population.

	Short-DAPT (N = 283)	Prolonged-DAPT (N = 283)	Standardized mean difference
Age	65.6 ± 11.0	66.0 ± 10.7	0.035	0.676
Male	203 (71.7)	202 (71.4)	0.008	>0.999
Initial presentation			0.046	0.960
Stable angina	82 (29.0)	79 (27.9)
Unstable angina	133 (47.0)	131 (46.3)
Non-ST-segment elevation MI	33 (11.7)	34 (12.0)
ST-segment elevation MI	35 (12.4)	39 (13.8)
Atrial fibrillation	6 (2.1)	5 (1.8)	0.026	>0.999
Body mass index	24.7 ± 3.1	24.5 ± 3.2	0.074	0.378
Hypertension	175 (61.8)	178 (62.9)	0.022	0.862
Diabetes	104 (36.7)	103 (36.4)	0.007	>0.999
Diabetes on insulin	13 (4.6)	14 (4.9)	0.017	>0.999
Current smoker	77 (27.2)	72 (25.4)	0.040	0.703
Dyslipidemia	132 (46.6)	133 (47.0)	0.007	>0.999
Previous MI	19 (6.7)	23 (8.1)	0.054	0.630
Congestive heart failure	1 (0.4)	3 (1.1)	0.084	0.616
Peripheral vascular disease	11 (3.9)	12 (4.2)	0.018	>0.999
Chronic kidney disease	15 (5.3)	14 (4.9)	0.016	>0.999
Chronic kidney disease on dialysis	8 (2.8)	8 (2.8)	<0.001	>0.999
LV ejection fraction	60.3 ± 11.1	59.4 ± 11.8	0.078	0.355
Target vessel
(1) Left main	20 (7.1)	26 (9.2)	0.078	0.442
(2) Left anterior descending artery	173 (61.1)	172 (60.8)	0.007	>0.999
(3) Left circumflex artery	78 (27.6)	81 (28.6)	0.024	0.852
(4) Right coronary artery	103 (36.4)	103 (36.4)	<0.001	>0.999
Multivessel stent	70 (24.7)	73 (25.8)	0.024	0.847
Number of stents	1.6 ± 0.9	1.6 ± 0.9	0.041	0.627
Mean diameter of stent	3.1 ± 0.4	3.1 ± 0.4	0.035	0.674
Stent length	40.2 ± 26.7	40.9 ± 26.5	0.029	0.732
Femoral approach	89 (31.4)	95 (33.6)	0.045	0.654
Overlapping stenting	43 (15.2)	41 (14.5)	0.020	0.906
Bifurcation stenting	3 (1.1)	5 (1.8)	0.060	0.722
Noncompliance balloon postdilatation	268 (94.7)	269 (95.1)	0.016	>0.999
IVUS use	82 (29.0)	66 (23.3)	0.129	0.151
Complete revascularization	156 (55.1)	161 (56.9)	0.036	0.735
Discharge medication
(1) Beta-blocker	166 (58.7)	163 (57.6)	0.021	0.865
(2) Calcium channel blocker	74 (26.1)	76 (26.9)	0.016	0.924
(3) ACE inhibitor or ARB	178 (62.9)	179 (63.3)	0.007	>0.999
(4) Statin	271 (95.8)	272 (96.1)	0.018	>0.999
PRECISE-DAPT score	15.0 ± 8.7	15.1 ± 8.4	0.004	0.965

ACE, angiotensin-converting enzyme; ARB, angiotensin-receptor blocker; DAPT, dual antiplatelet therapy; LV, left ventricle; MI, myocardial infarction.