Difference in Ki Decline Between Ropinirole vs. l-DOPA Groups in Striatal Subregions
| Striatal subregion | Absolute % difference in Ki decline between treatment groups | Relative % difference in Ki decline between treatment groups |
|---|---|---|
| Putamen | 6.86 | 33.4 |
| Caudate nucleus | 4.6 | 31.5 |
| Ventral striatum | 1.28 | 13 |
In each region, the absolute and percentage Ki loss was in favor of ropinirole—that is, group mean Ki decline was greater in l-DOPA group compared with that of ropinirole group. Mean scan-to-scan interval: ropinirole, 615 ± 97.7 d; l-DOPA, 613 ± 103.3 d.