Specific to non-specific [123I]ß-CIT binding ratios (mean±SD) at baseline and 5-year follow-up
| Baseline | 5-year follow-up | ||||
| Hyposmic relatives | |||||
| Normosmic relatives | Hyposmic relatives | Normosmic relatives | No parkinsonism | Parkinsonism | |
| N=35 | N=39 | N=34 | N=32 | N=4 | |
| Left striatum | 7.79±0.9 | 7.55±2.2 | 7.50±1.3 | 7.60±1.0 | 3.48±1.1 |
| Right striatum | 7.77±1.0 | 7.53±2.1 | 7.43±1.5 | 7.47±1.1 | 3.29±0.4 |
| Left putamen | 5.94±0.9 | 5.76±1.8 | 5.96±1.1 | 5.90±1.0 | 2.05±0.7 |
| Right putamen | 5.90±0.9 | 5.74±1.7 | 5.71±1.2 | 5.74±1.1 | 1.88±0.1 |
| Left caudate | 8.87±1.0 | 8.96±2.7 | 8.41±1.5 | 8.77±1.2 | 4.89±1.6 |
| Right caudate | 8.91±1.0 | 8.90±2.6 | 8.48±1.7 | 8.70±1.3 | 4.89±0.7 |