Table 1.
Subject demographics.
| LD | LD/DTv | HC | p-value | |
|---|---|---|---|---|
| Number of subjects | 24 | 21 | 30 | |
| Age years; mean ± st. dev. | 49.7 ± 11.6 | 56.2 ± 13.2 | 50.4 ± 10.8 | >0.08 |
| Gender | 16 F/8 M | 18 F/3 M | 19 F/11 M | >0.08 |
| Handedness Edinburgh Inventory | Right | |||
| Language | Monolingual native English | |||
| Dystonia subtype | 15 ADLD 9ABLD | 14 ADLD/DTv 7 ABLD/DTv | N/A | 0.78 |
| Dystonia genetic status | Negative for DYT1, DYT6, DYT4, DYT25 | |||
| Onset years; mean ± st. dev. | 37.8 | 42.9 | N/A | 0.18 |
| Duration years; mean ± st. dev. | 12.0 ± 10.1 | 13.3 ± 11.6 | N/A | 0.67 |
| Symptom severity voice breaks per sentence; mean ± st. dev. | 3.49 ± 1.92 | 4.02 ± 2.65 | N/A | 0.45 |
Comparisons were made between each patient group and controls as well as between the two patient groups using two-sample t-test at a p ≤ 0.05. LD – laryngeal dystonia, ADLD – adductor laryngeal dystonia, ABLD – abductor laryngeal dystonia, DTv – dystonic tremor of voice, F – female, M – male, st. dev. – standard deviation, N/A – not applicable.