Table.1.
Subject and image characteristics.
| Characteristic | Positive subjects (n = 50) | Negative subjects (n = 50) |
|---|---|---|
| Subjects | ||
| Age (year) | ||
| < 60 | 13 | 11 |
| 60 to < 80 | 34 | 36 |
| ≥ 80 | 3 | 3 |
| Sex | ||
| Male | 30 | 30 |
| Female | 20 | 20 |
| Body mass index (kg/cm2) | ||
| < 18.5 (emaciation) | 3 | 3 |
| 18.5 to < 25 (normal) | 31 | 24 |
| ≥ 25 (obesity) | 8 | 9 |
| Not available | 8 | 14 |
| Primary tumora | ||
| Breast cancer | 9 | 9 |
| Prostate cancer | 10 | 10 |
| Lung cancer | 11 | 11 |
| Other malignancies | 27 | 30 |
| Images | ||
| Scan target of current CT scan | ||
| Head | 2 | 2 |
| Chest | 7 | 12 |
| Abdomen | 2 | 4 |
| Neck to chest | 1 | 2 |
| Chest to abdomen | 30 | 28 |
| Neck to abdomen | 8 | 2 |
| Slice thickness (previous/current) | ||
| ≤ 1 mm/≤ 1 mm | 41 | 41 |
| ≤ 1 mm/> 1 mm | 2 | 2 |
| > 1 mm/≤ 1 mm | 2 | 2 |
| > 1 mm/> 1 mm | 5 | 5 |
| Use of intravenous contrast medium (previous/current) | ||
| +/+ | 24 | 16 |
| +/− | 4 | 2 |
| −/ + | 2 | 3 |
| −/− | 20 | 29 |
| Study interval | ||
| > 30 days and < 1 year | 20 | 11 |
| ≥ 1 year | 30 | 39 |
CT computed tomography.
aMultiple options were permitted.