Table 1.
Summary of trial and patient characteristics
| Total number of papers included in this review | 75 |
| Type of paper (%) | |
| Case report | 4 (5.3) |
| Case series | 49 (65.3) |
| Case-controlled study | 13 (17.3) |
| Randomized controlled trial | 7 (9.3) |
| Pharmaco-economic | 2 (2.7) |
| Total number of patients | 6,528 |
| Mean number of patients, per paper (SD) | 87.0 (145.5) |
| Mean age of dystonia onset, in years | 47.6 |
| Male to female ratio | 1:2 |
| Type of dystonia studied, number of papers (%) | |
| Blepharospasm | 10 (13.3) |
| Cervical | 25 (33.3) |
| Laryngeal | 4 (5.3) |
| Musician’s | 1 (1.3) |
| Oromandibular | 3 (4.0) |
| Segmental | 3 (4.0) |
| Generalized | 3 (4.0) |
| Various types | 26 (34.7) |
| Number of publications per decade | |
| Until 2000 | 4 (5.3) |
| 2000–2009 | 33 (44.0) |
| 2010–2018 | 38 (50.7) |