Cardiology Research and Practice

Research Article

Prognostic Value of the Residual SYNTAX Score on In-Hospital and Follow-Up Clinical Outcomes in ST Elevation Myocardial Infarction Patients Undergoing Percutaneous Coronary Interventions

Table 5

Univariate and multivariate cox regression analysis for determining the risk factors associated with long-term cardiac death.


Variables	Univariate analysis		Multivariate analysis for SS		Multivariate analysis for RSS
Variables	HR (95% CI)		HR (95% CI)		HR (95% CI)

Age	1.181 (1.13–1.234)	<0.001	1.156 (1.093–1.223)	<0.001	1.171 (1.104–1.243)	<0.001
Male gender	0.41 (0.19–0.885)	0.023	1.895 (0.753–4.766)	0.175	2.162 (0.858–5.448)	0.102
HT	0.697 (0.325–1.493)	0.353	—	—	—	—
DM	1.69 (0.784–3.643)	0.180	—	—	—	—
HL	0.583 (0.273–1.244)	0.163	—	—	—	—
CAD	0.998 (0.403–2.474)	0.997	—	—	—	—
Smoking	0.254 (0.096–0.674)	0.006	0.891 (0.255–3.117)	0.857	0.867 (0.259–2.905)	0.817
Hba1c	1.091 (0.875–1.362)	0.439	—	—	—	—
CreCl	0.975 (0.96–0.989)	0.001	1.008 (0.982–1.035)	0.550	1.013 (0.987–1.04)	0.335
Hb	0.795 (0.671–0.941)	0.008	0.955 (0.768–1.189)	0.682	0.972 (0.815–1.159)	0.751
LVEF	0.973 (0.94–1.008)	0.125	—	—	—	—
WBC	0.956 (0.855–1.068)	0.425	—	—	—	—
CRP	0.956 (0.855–1.068)	0.868	—	—	—	—
PLT	1.002 (0.997–1.006)	0.399	—	—	—	—
Stent diameter	0.747 (0.302–1.849)	0.528	—	—	—	—
Stent length	0.981 (0.946–1.017)	0.294	—	—	—	—
Number of stents	0.529 (0.203–1.378)	0.192	—	—	—	—
Type of stent			—	—	—	—
BMS	Ref	—	—	—	—	—
DES	0.753 (0.338–1.679)	0.488	—	—	—	—
Anterior infarction	0.775 (0.354–1.694)	0.522	—	—	—	—
Inferior infarction	1.203 (0.562–2.575)	0.634	—	—	—	—
Other infarction	1.257 (0.297–5.312)	0.756	—	—	—	—
SS	1.118 (1.077–1.161)	<0.001	1.074 (1.032–1.118)	<0.001	—	—
RSS	1.115 (1.076–1.157)	<0.001	—	—	1.083 (1.038–1.13)	<0.001
Grace Score	1.046 (1.032–1.061)	<0.001	1.019 (0.997–1.041)	0.085	1.017 (0.996–1.039)	0.113

BMS: bare metal stent, CAD: coronary artery disease, CreCl: creatinine clearance, CRP: C-reactive protein, DES: drug eluting stent, DM: diabetes mellitus, Hb: hemoglobin, HbA1C: hemoglobin A1C, HL: hyperlipidemia, HT: hypertension, LVEF: left ventricular ejection fraction, PLT: platelet, RSS: residual SYNTAX score, SS: SYNTAX score, and WBC: white blood cell.