Baseline Characteristics
| Characteristic | Total (n = 598) | SPECT (n = 310) | CTA (n = 288) | P |
| Mean age ± SD | 53.2 ± 12.2 | 52.6 ± 11.9 | 53.9 ± 12.5 | 0.18 |
| Female sex | 332 (56.1) | 174 (56.1) | 158 (54.9) | 0.76 |
| Race | 0.05 | |||
| Black | 178 (29.8) | 101 (32.6) | 77 (26.7) | |
| White | 334 (55.9) | 172 (55.5) | 162 (56.3) | |
| Hispanic | 69 (11.5) | 30 (9.6) | 39 (13.5) | |
| Asian | 8 (1.3) | 1 (0.3) | 7 (2.4) | |
| Other | 9 (1.5) | 6 (1.9) | 3 (1.1) | |
| Body mass index | 31.2 ± 8.3 | 31.8 ± 9.1 | 30.5 ± 7.4 | 0.05 |
| Risk factors | 5 (1,10) | 4 (2,10) | 0.60 | |
| Hypertension | 301 (50.3) | 157 (50.7) | 144 (50.0) | 0.88 |
| Diabetes mellitus | 90 (15.1) | 48 (15.4) | 42 (14.6) | 0.76 |
| Dyslipidemia | 228 (38.1) | 115 (37.1) | 113 (39.2) | 0.59 |
| Current smoker | 162 (27.1) | 85 (27.2) | 77 (26.4) | 0.98 |
| Family history of CAD | 137 (22.9) | 66 (21.3) | 71 (24.7) | 0.33 |
| Acetylsalicylic acid within past 7 d | 184 (30.8) | 97 (31.3) | 87 (30.2) | 0.78 |
| Severe angina last 24 h | 32 (5.4) | 14 (4.5) | 18 (6.3) | 0.35 |
| Thrombolysis in Myocardial Infarction risk score | 0.67 | |||
| 0 | 315 (52.7) | 170 (54.8) | 145 (50.4) | |
| 1 | 183 (30.6) | 90 (29.0) | 93 (32.3) | |
| 2 | 86 (14.4) | 44 (14.2) | 42 (14.6) | |
| 3 | 14 (2.3) | 6 (1.9) | 8 (2.8) | |
| Framingham risk score | 0.95 | |||
| 0%–10% (low) | 458 (76.6) | 239 (77.1) | 219 (76.0) | |
| 11%–20% (intermediate) | 113 (18.9) | 57 (18.4) | 56 (19.4) | |
| >20% (high) | 27 (4.5) | 14 (4.5) | 13 (4.5) |
Data are mean ± SD for continuous variables; medians, with interquartile ranges in parentheses if continuous variables were skewed; and numbers, with percentages in parentheses for categoric variables.