Table 1.
Baseline Characteristics
| Characteristic | Total (n=400) | CT (n=200) | MPI (n=200) |
|---|---|---|---|
| Demographics | |||
| Female | 251 (62.8) | 126 (63.0) | 125 (62.5) |
| Mean Age (SD) | 56.6 (11.2) years | 56.8 (11.8) years | 56.3 (10.5) years |
| Ethnicity (self-reported) | |||
| Hispanic | 213 (53.7) | 105 (52.8) | 108 (54.6) |
| African-American | 145 (36.5) | 78 (39) | 67 (34) |
| Asian | 18 (4.5) | 7 (4) | 11 (5.6) |
| Caucasian | 18 (4.5) | 8 (4) | 10 (5.1) |
| Other | 3 (0.8) | 1 (0.5) | 2 (1) |
| Interpreter used | 103 (25.8) | 50 (25) | 53 (27) |
| Mean SES Z-score* | −4.2 | −4.1 | −4.3 |
| Risk Factors | |||
| Mean BMI (SD) | 30.6 (6.4) kg/m2 | 30.5 (6.2) kg/m2 | 30.7 (6.6) kg/m2 |
| Diabetes mellitus | 127 (31.8) | 66 (33) | 61 (31) |
| Hypertension | 288 (72.0) | 141 (70.5) | 147 (73.5) |
| Mean Systolic / Diastolic Blood Pressure (SD) |
127 (20) / 75 (13) mmHg | 129 (20) / 76 (12) mmHg | 126 (20) / 75 (14) mmHg |
| Dyslipidemia | 296 (51.5) | 97 (49) | 109 (55) |
| Taking statin | 135 (33.8) | 61 (31) | 74 (37) |
| Current smoker | 59 (15) | 33 (17) | 26 (13) |
| 1° relative with CAD | 148 (37.0) | 75 (38) | 73 (37) |
| Taking aspirin | 149 (37.5) | 77 (39) | 72 (36) |
| No regular exercise | 180 (45.0) | 98 (49) | 82 (41) |
| Post-menopausal women | 174 (43.5) | 87 (44) | 87 (44) |
| Presentation / Risk Criteria | |||
| Pain > 20 minutes | 248 (62.0) | 123 (61.5) | 125 (62.5) |
| New pain on exertion within last 2 weeks |
151 (37.8) | 72 (36) | 79 (40) |
| ST or T wave abnormality on ECG |
113 (28.3) | 49 (25) | 64 (32) |
| Age ≥ 70 years | 54 (14) | 34 (17) | 20 (10) |
| Sub-clinical Troponin elevation |
19 (4.8) | 8 (4) | 11 (5.5) |
| Diamond-Forrester | |||
| Mean Pre-test probability | 37% | 36% | 37% |
| Retrosternal pain | 278 (69.5) | 134 (67.0) | 144 (72.0) |
| Extertional pain | 160 (40.0) | 77 (39) | 83 (42) |
| Relieved by rest or nitroglycerin |
189 (47.3) | 95 (48) | 94 (47) |
| Mean TIMI Score (SD) | 1.3 (1.0) | 1.3 (1.0) | 1.2 (1.0) |
| Past Medical History | |||
| Gastroesophageal reflux or ulcer disease |
182 (45.5) | 88 (44) | 94 (47) |
| Chest wall, rib or muscle pain |
109 (27.3) | 48 (24) | 61 (31) |
| Panic attacks or anxiety disorders |
96 (24) | 41 (21) | 55 (28) |
BMI, body mass index; CAD, coronary artery disease; CT, coronary computed tomography angiography; ECG, electrocardiogram; MPI, radionuclide stress myocardial perfusion imaging; SD, standard deviation; SES, socioeconomic status; TIMI, thrombolysis in myocardial infarction
Numbers in parentheses represent percents unless otherwise noted.
*
Socioeconomic status score is based on the patient's address zip code (median household income, median value of housing units, percentage of households receiving interest/dividend/rental income, education, percentage of adults who completed college, and percentage of employed individuals in executive/managerial/professional positions) and is normalized to the New York state average.