Table 2. Comparison of characteristics between patients with PD and pRBD only by the RBDSQ-J and RBD1Q.
| RBDSQ-J | RBD1Q | p value | |
|---|---|---|---|
| N | 35 | 33 | |
| Age (year) | 68.6 ± 7.9 | 65.4 ±8.6 | 0.11 |
| SEX (n) M:F | 15:20 | 20:13 | 0.023 |
| Duration (year) | 6.5 ± 5.1 | 5.7 ± 4.2 | 0.475 |
| Hoehn & Yahr scale (on period) | 2.5 ± 0.9 | 2.1 ± 0.6 | 0.048 |
| Mini-Mental State Examination | 28.2 ± 1.7 | 28.5 ±1.9 | 0.60 |
| LED (mg/day) | 538 ± 603 (n:30) | 373 ± 225 (n:30) | 0.164 |
| MDS-UPDRS UPDRS I | 13.0 ± 8.1 | 9.6 ± 5.2 | 0.045 |
| UPDRS II | 15.9 ± 10.4 | 12.1 ± 7.0 | 0.081 |
| UPDRS III | 51.2 ± 20.0 | 42.1 ± 24.6 | 0.096 |
| UPDRS IV | 2.2± 3.7 | 1.2± 3.4 | 0.24 |
| Correct answer of odor identification test | 4.3 ± 2.1 | 3.7 ± 2.1 | 0.31 |
Values are mean ± SD (range), RBDSQ-J: REM sleep behavior disorder screening questionnaire-Japanese version, RBD1Q: the RBD Single-Question Screen, pRBD: probable REM sleep behavior disorder, LED: levodopa equivalent dose, MDS-UPDRS: Movement Disorder Society Revision of the Unified Parkinson’s disease rating scale.