Table 1.
Botulinum toxin in hand tremor: Demographics and baseline data (n = 91).
| Mean | SD | Range | |
|---|---|---|---|
| Age at first injection (years) | 64.8 | 12.8 | 18–93 |
| Tremor duration at first injection (years) | 23.2 | 17.5 | 0.5–75 |
| Follow-up period (months) | 29.6 | 25.1 | 3–88 |
| Number of onaBoNT-A sessions | 7.7 | 6.3 | 2–31 |
| OnaBoNT-A units per session † | 71.8 | 37.3 | 22.5–225 |
| OnaBoNT-A units † (per treatment indication) | |||
| ET (n = 53) | 71.3 | 36.7 | 22.5–225 |
| PD (n = 6) | 47.9 | 11.5 | 37.5–67.5 |
| Dystonia (n = 31) | 77.3 * | 41.0 | 27.5–187.5 |
| COT (n = 1) | 70 | - | - |
SD = Standard deviation, ET = Essential tremor, PD = Parkinson’s disease, onaBoNT-A = onabotulinumtoxin-A, COT = Cerebellar outflow tremor. * p = 0.49 for comparison with ET. † mean dose per limb (first and last visit combined).