Baseline Demographic and Clinical Data of Study Population (n = 362)
| Baseline parameter | Data |
| Age (y) | |
| Median | 66 |
| Range | 19–96 |
| Sex (n) | |
| Male | 127 |
| Female | 235 |
| 18F-FDG–avid primary cancer on index PET/CT (n) | 272 (75%) |
| Primary malignancy (n) | |
| Lymphoma | 69 (19%) |
| Lung | 59 (16%) |
| Colorectal | 43 (12%) |
| Melanoma | 33 (9%) |
| Other | 159 (44%) |
| AJCC stage of primary malignancy (n) | |
| 1 | 47 (13%) |
| 2 | 54 (15%) |
| 3 | 100 (28%) |
| 4 | 156 (43%) |
| Occult primary tumor (n) | 5 (1%) |
AJCC = American Joint Committee on Cancer.