Table 1. Baseline Characteristics of the Study Cohort Stratified by Statin Therapy.
| Characteristics | Total NO (%) | Statin Therapy NO (%) | No Statin Therapy NO(%) | P value | |
|---|---|---|---|---|---|
| All eligible patients | 14,958 | 11,268(75.3) | 3690(24.7) | <0.001 | |
| Demographic | |||||
| Age, years | 0.092 | ||||
| <55 | 3346(22.4) | 2563(22.7) | 783(21.2) | ||
| 55–64 | 3562(23.8) | 2710(24.1) | 852(23.1) | ||
| 65–74 | 4471(29.8) | 3258(28.9) | 1213(32.9) | ||
| ≥75 | 3579(23.9) | 2737(24.3) | 842(22.8) | ||
| Gender | |||||
| Female | 4446(29.7) | 3306(29.3) | 1140(30.9) | 0.073 | |
| CVD risk factors | |||||
| Prior hypertension | 7430(49.7) | 5908(52.4) | 1522(41.2) | <0.001 | |
| Prior diabetes | 2603(17.4) | 2134(18.9) | 469(12.7) | <0.001 | |
| Prior dyslipidemia | 9050(60.5) | 7410(65.8) | 1640(44.4) | <0.001 | |
| Current smoker | 5242(35.0) | 4197(37.2) | 1045(28.3) | <0.001 | |
| Medical histories | |||||
| Myocardial infarction | 1615(10.8) | 1267(11.2) | 348(9.4) | 0.002 | |
| Ischemic stroke | 1534(10.3) | 1159(10.3) | 375(10.2) | 0.831 | |
| Hemorrhagic stroke | 184(1.2) | 134(1.2) | 50(1.4) | 0.428 | |
| Clinical characteristics at admission | |||||
| Chest discomfort | 13751(91.9) | 10467(92.9) | 3284(89.0) | <0.001 | |
| Cardiac arrest | 176(1.2) | 141(1.3) | 35(0.9) | 0.138 | |
| Cardiac shock | 644(4.3) | 462(4.1) | 182(4.9) | 0.031 | |
| AMI type | |||||
| STEMI | 12806(85.6) | 9569(84.9) | 3237(87.7) | <0.001 | |
| Laboratory test | |||||
| LDL-C level, mmol/L | <0.001 | ||||
| < 1.81 | 1443(9.6) | 1158(10.3) | 285(7.7) | ||
| 1.81–2.59 | 3677(24.6) | 3030(26.9) | 647(17.5) | ||
| 2.60–3.37 | 3803(25.4) | 3166(28.1) | 637(17.3) | ||
| >3.37 | 2707(18.1) | 2291(20.3) | 416(11.3) | ||
| Unmeasured | 3328(22.2) | 1623(14.4) | 1705(46.2) | ||
| Economic-geographic region | <0.001 | ||||
| Eastern | 8866(59.3) | 6783(60.2) | 2083(56.4) | ||
| Central | 3195(21.4) | 2246(19.9) | 949(25.7) | ||
| Western | 2897(19.4) | 2239(19.9) | 658(17.8) | ||
| Urban/Rural | |||||
| Rural | 5664(37.9) | 3796(33.7) | 1868(50.6) | <0.001 | |
| Urban | 9294(62.1) | 7472(66.3) | 1822(49.4) | ||
| Year | <0.001 | ||||
| 2001 | 2198(14.7) | 613(5.4) | 1585(43.0) | ||
| 2006 | 4159(27.8) | 3016(26.8) | 1143(31.0) | ||
| 2011 | 8601(57.5) | 7639(67.8) | 962(26.1) | ||
AMI indicates acute myocardial infarction;
STEMI indicates ST-segment elevation myocardial infarction;
LDL-C indicates low density lipid cholesterol.