Table 2.
Sample Characteristics and Covariates
| Descriptor | Overall (n = 75) |
|---|---|
| Median interval between scan and blood collection, d (range) | 1 (0–16) |
| Bone metastases at time of scan, n (%) | |
| Present | 24 (32) |
| Absent | 51 (68) |
| Treatment-naive or pretreatment sample,a n (%) | |
| Yes | 13 (17) |
| No | 62 (83) |
| Treatment status at time of blood collection, n (%) | |
| On treatment | 27 (36) |
| Chemotherapy alone | 12 (16) |
| Chemotherapy with concurrent radiation | 2 (3) |
| Immunotherapy | 9 (12) |
| Other | 4 (5) |
| Off treatment | 48 (64) |
a
In the treatment-naive and pretreatment analyses, n = 11 as two samples were excluded to ensure one sample per patient.