Table 1. Propensity Score and Clinical Characteristics.
| Variable | Frequency, No. (%) | P Value | |
|---|---|---|---|
| ACS Group (n = 189) | Control Group (n = 189) | ||
| Included in propensity score | |||
| Age, mean (SD), y | 59.6 (10.3) | 60.3 (9.3) | .33 |
| Male sex | 126 (66.7) | 121 (64.0) | .33 |
| Diabetes | 37 (19.6) | 57 (30.2) | .006 |
| Hypertension | 116 (62.0) | 106 (56.1) | .21 |
| Hyperlipidemia | 105 (55.6) | 102 (54.0) | .82 |
| Familial history of CAD | 80 (43.5) | 78 (41.3) | .44 |
| Current smoker | 56 (29.6) | 43 (22.8) | .09 |
| CAD severity | |||
| None | 13 (7.3) | 25 (13.2) | .06 |
| Nonobstructive | 69 (38.8) | 75 (39.7) | |
| 1-Vessel obstructive | 26 (14.6) | 38 (20.1) | |
| 2-Vessel obstructive | 31 (17.4) | 21 (11.1) | |
| 3-Vessel/left main obstructive | 39 (21.9) | 30 (15.9) | |
| Angina type | |||
| Asymptomatic | 25 (14.0) | 64 (35.0) | .001 |
| Noncardiac | 20 (11.2) | 23 (12.6) | |
| Atypical | 8 (47.8) | 69 (37.7) | |
| Typical | 48 (27.0) | 27 (14.8) | |
| Race/ethnicity | |||
| White | 85 (62.0) | 89 (62.2) | .59 |
| East Asian | 43 (31.4) | 42 (29.4) | |
| Other | 9 (6.6) | 12 (8.4) | |
| Lipid profile, mean (SD), mg/dL | |||
| Cholesterol | |||
| Total | 190.0 (48.2) | 186.7 (40.7) | .67 |
| Low-density lipoprotein | 116.6 (42.6) | 119.2 (32.1) | .78 |
| High-density lipoprotein | 43.5 (10.9) | 47.8 (13.2) | .09 |
| Medications | |||
| Statins | 75 (58.1) | 64 (49.2) | .24 |
| Aspirin | 73 (52.5) | 66 (47.5) | .78 |
| ACEI/ARB | 51 (37.0) | 52 (37.4) | >.99 |
| β-Blocker | 49 (35.5) | 49 (35.3) | .79 |
| Interval coronary revascularization | 92 (48.7) | 42 (22.2) | <.001 |
| ACS type | |||
| Myocardial infarction | |||
| ST-segment elevation | 33 (17.5) | NA | NA |
| Non–ST-segment elevation | 90 (47.6) | NA | NA |
| Unclassified | 3 (1.6) | NA | NA |
| Unstable angina | 63 (33.0) | NA | NA |
Abbreviations: ACEI, angiotensin-converting enzyme inhibitor; ACS, acute coronary syndrome; ARB, angiotensin receptor blocker; CAD, coronary artery disease; NA, not applicable.
SI conversion factor: To convert cholesterol levels to millimoles per liter, multiply by 0.0259.