Clinical Characteristics of Patients in Prone and Upright Imaging Groups
| Characteristic | Prone group (n = 23) | Upright group (n = 22) |
| Age (y) | 69 ± 10 | 74 ± 4 |
| Male (n) | 23 (100%) | 22 (100%) |
| Height (m) | 1.67 ± 0.05 | 1.66 ± 0.06 |
| Body weight (kg) | 64.5 ± 6.02 | 64.5 ± 9.19 |
| Body mass index | 23.2 ± 1.79 | 23.3 ± 2.37 |
| Coronary risk factors | ||
| Smoking | 14 (60.8%) | 18 (78.2%) |
| Hypertension | 18 (78.3%) | 18 (78.2%) |
| Hyperlipidemia | 16 (69.6%) | 18 (78.2%) |
| Diabetes mellitus | 10 (43.5%) | 7 (30.4%) |
| Familial hypercholesterolemia | 4 (17.4%) | 8 (34.7%) |
| Impaired glucose tolerance | 0 (0%) | 1 (4.3%) |
| Other factors | ||
| Blood glucose | 128.7 ± 63.2 | 120.3 ± 36.2 |
| Hemoglobin A1c | 6.30 ± 0.87 | 6.57 ± 0.72 |
| High-density-lipoprotein cholesterol | 54.6 ± 11.6 | 49.9 ± 14.4 |
| Low-density-lipoprotein cholesterol | 90.9 ± 24.4 | 87.9 ± 19.4 |
| Study protocol | ||
| Exercise time | 8 min 9 s | 7 min 26 s |
| Maximum stress (watt [%]) | 121.7 ± 24.8 | 110.2 ± 24.6 |
| (Target heart rate/maximum heart rate) × 100 (%) | 91.7 ± 11.4 | 87.9 ± 19.4 |
| Patients reaching target heart rate (n) | 8 (34.7%) | 7 (30.4%) |
| Maximum blood pressure (mm Hg) | 205.8 ± 25.8 | 196.7 ± 28.5 |
| Patients in whom ST changed on electrocardiography (n) | 3 (13.0%) | 2 (8.70%) |
There were no significant differences between the prone and upright groups.