Interim scintigraphy results according to study performed with either 67Ga SPECT or PET/CT, and according to pretreatment risk group
| . | Intermediate risk . | High risk . | All . |
|---|---|---|---|
| No. patients | 69 | 39 | 108 |
| No. negative early interim scintigraphy studies/no. performed scans (%)† | 58/69 (84) | 31/39 (79) | 89/108 (82) |
| Relapse and PRD, no./no. positive scintigraphy study (%)† | 2/11 | 2/8 | 4/19 (21) |
| 67Ga negative predictive value, no. (%) | 26/31 (83) | 13/15 (86) | 31/46 (85) |
| PET negative predictive value, no. (%) | 27/27 (100) | 15/16 (93) | 42/43 (98) |
| . | Intermediate risk . | High risk . | All . |
|---|---|---|---|
| No. patients | 69 | 39 | 108 |
| No. negative early interim scintigraphy studies/no. performed scans (%)† | 58/69 (84) | 31/39 (79) | 89/108 (82) |
| Relapse and PRD, no./no. positive scintigraphy study (%)† | 2/11 | 2/8 | 4/19 (21) |
| 67Ga negative predictive value, no. (%) | 26/31 (83) | 13/15 (86) | 31/46 (85) |
| PET negative predictive value, no. (%) | 27/27 (100) | 15/16 (93) | 42/43 (98) |
Positive predictive value was calculated as disease progression divided by positive studies. Negative predictive value was defined as the number of event-free patients divided by the number of negative studies.
Resolution of uptake in early interim analysis.
Positive predictive value.
§P < .001 for negative predictive value between PET/CT and Ga.