Table 1.
Baseline characteristics of participants
| CU n = 44 | iRBD n = 22 | P-value | |
|---|---|---|---|
| Age, years | 64.9 (7.5) [51.4, 83.0] | 65.4 (8.0) [51.7, 83.3] | 0.20 |
| Males, no. (%) | 34 (77%) | 17 (77%) | 1.00 |
| APOE, no. (%) | 12 (27%) | 5 (28%) | 0.84 |
| Education, years | 15.3 (2.2) [12, 20] | 16.3 (2.6) [12, 20] | 0.13 |
| MMSE | 28.8 (0.7) [27, 30] | 28.7 (1.3) [26, 30] | 0.73 |
| CDR-SOB | 0.0 (0.1) [0.0, 0.5] | 0.2 (0.4) [0.0, 1.0] | 0.091 |
| Follow-up, years | 3.2 (2.4) [0.0, 7.7] | 3.4 (2.6) [0.0, 7.1] | 0.29 |
| DaTQuant Putamen | NA | 1.82 (0.42) [0.56, 2.52] | — |
| DaTQuant Caudate | NA | 2.18 (0.44) [0.77, 2.73] | — |
| Parkinsonism, no. (%) | NA | 2 (10%) | — |
| Visual Hallucinations, no. (%) | NA | 1 (5%) | — |
| Fluctuations, no. (%) | NA | 1 (8%) | — |
| RBD Duration, years | NA | 12.7 (12.5) [1, 41] | — |
| RBD Onset Age, years | NA | 52.2 (17.1) [22, 77] | — |
Values correspond to mean (SD) for the continuous variables and count (%) for the categorical variables. P-values for differences between groups come from conditional logistic models that account for the matching.
APOE, apolipoprotein E; CDR-SOB, Clinical Dementia Rating Sum Of Boxes; CU, clinically unimpaired; iRBD, idiopathic Rapid Eyes Movement (REM) sleep Behaviour Disorder; MMSE, Mini-Mental State Examination.