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Prevalence of co-morbid vocal and non-vocal tremor; frequency (%).
| Controls (n = 146) | SD (n = 128) | P | Odds Ratio | 95% Confidence Interval | |
|---|---|---|---|---|---|
| Tremor, Any | 21 (14%) | 41 (32%) | <0.001 | 2.81 | 1.55 – 5.08 |
| Vocal Tremor | 5 (3%) | 33 (26%) | < 0.001 | 12.81 | 4.12 – 39.77 |
| Non-Vocal Tremor | 21 (14%) | 27 (21%) | 0.14 | 1.59 | 0.85 – 3.1 |
