Table 2.
Use of backup stem cells for second ASCT and stem cell boost
| Characteristic | % using backup stem cells for second ASCT (n) | % using backup stem cells for stem cell boost (n) | |
|---|---|---|---|
| Overall | 4.8 (19) | 2.5 (10) | |
| Age, years | <60 | 5.9 (13) | 2.3 (5) |
| 60–70 | 3.2 (5) | 2.5 (4) | |
| >70 | 0 (0) | 5.9 (1) | |
| Cytogenetics | Standard risk | 5.6 (16) | 2.4 (7) |
| High risk | 1.7 (1) | 1.7 (1) | |
| ISS stage | 1 | 6.0 (8) | 1.5 (2) |
| 2 | 4.7 (4) | 3.5 (3) | |
| 3 | 2.9 (2) | 2.9 (2) | |
| Duration of first remission in relapsed patients (n = 240) | <2 years | 4.8 (6) | 2.4 (3) |
| 2–3 years | 4.8 (2) | 0 (0) | |
| ≥3 years | 13.9 (10) | 4.2 (3) | |
| Response status prior to first ASCT | SD | 16.7 (3) | 5.6 (1) |
| VGPR | 5.9 (7) | 1.7 (2) | |
| PR | 3.8 (7) | 2.7 (5) | |
| CR | 1.7 (1) | 3.4 (2) | |
| Stringent CR | 0 (0) | 0 (0) | |
| PD | 0 (0) | 0 (0) | |
Table abbreviations: SD = stable disease, VGPR = very good partial response; PR = partial response; CR = complete response; PD = progressive disease