Baseline Characteristics of Patients
| Variable | Data |
| Age (y) | 71 (55–90) |
| Gleason score | |
| ≤7 | 17 (28%) |
| ≥8 | 36 (60%) |
| Unknown | 7 (12%) |
| Prostate-specific antigen level (μg/L) | 65 (1.1–9,375) |
| Preexisting cytopenia grade 2 | 7 (12%) |
| Anemia | 5 (8%) |
| Neutropenia | 1 |
| Thrombocytopenia | 1 |
| Prior treatment lines for mCRPC | |
| 0 | 17 (28%) |
| 1 | 20 (33%) |
| 2 | 14 (23%) |
| 3 or more | 9 (15%) |
| Prior chemotherapy | 26 (43%) |
| Extent of bone disease | |
| <6 metastases | 4 (7%) |
| 6–20 metastases | 17 (28%) |
| >20 metastases | 32 (53%) |
| Superscan | 7 (12%) |
Qualitative data are numbers followed by percentages in parentheses; continuous data are median followed by range in parentheses. Percentages may not sum to 100 because of rounding.