Table 1. Baseline Covariates for All Patients and the Subset With Baseline CTC Samples Included in Analyses.
| Covariate | No. (%) | |
|---|---|---|
| All S1216 patients (N = 1313) | Patients with baseline CTC samples (n = 503) | |
| Age, median (IQR), y | 68 (44-92) | 69 (46-90) |
| Race | ||
| Asian | 23 (1.8) | 9 (1.8) |
| Black | 142 (10.8) | 43 (8.5) |
| White | 1103 (84.0) | 435 (86.5) |
| Multiracial or othera | 8 (0.6) | 1 (0.2) |
| Unknown | 37 (2.8) | 14 (2.8) |
| ALP, median (IQR), U/L | 88 (68-153) | 83 (66-131) |
| Hb, median (IQR), g/dL | 14.2 (13.1-15.1) | 14.3 (13.1-15.1) |
| PSA, median (IQR), ng/mL | 30 (10-107) | 26 (9-90) |
| Bone pain | 308 (23.5) | 112 (22.3) |
| Bone metastases | 980 (74.6) | 366 (72.8) |
| Disease severity | ||
| Extensive | 642 (48.9) | 227 (45.1) |
| Minimal | 671 (51.1) | 276 (54.9) |
Abbreviations: ALP, alkaline phosphatase; CTC, circulating tumor cell; Hb, hemoglobin; PSA, prostate-specific antigen.
a
Other races included Native American and Pacific Islander.