The natural history of tardive dystonia. A long-term follow-up study of 107 cases.

The clinical picture, risk factors and natural history of tardive dystonia resulting from dopamine-receptor antagonist (DRA) treatment in 107 patients (57 male and 50 female), seen between 1972 and 1995, are described. The mean age at onset (+/- SD) was 38.3 +/- 13.