The majority had tic disorders (346; 57%) followed by dystonia (72; 12%); other movement disorders were less frequent (<5%).  Mean onset age of other movement disorders was 8.6 ± 5.7 years; mean delay of diagnosis was 11.1 ± 12.5 years.  Psychogenic movement disorders had a later onset than all other movement disorders (P < 0.01) apart from tremor and "other movement disorders." 
THERM
The majority had tic disorders (346; 57%) followed by dystonia (72; 12%); other movement disorders were less frequent (<5%).  Mean onset age of other movement disorders was 8.6 ± 5.7 years; mean delay of diagnosis was 11.1 ± 12.5 years.  Psychogenic movement disorders had a later onset than all other movement disorders (P < 0.01) apart from tremor and "other movement disorders." 
THERM
The majority had tic disorders (346; 57%) followed by dystonia (72; 12%); other movement disorders were less frequent (<5%).  Mean onset age of other movement disorders was 8.6 ± 5.7 years; mean delay of diagnosis was 11.1 ± 12.5 years.  Psychogenic movement disorders had a later onset than all other movement disorders (P < 0.01) apart from tremor and "other movement disorders." 
THERM
The majority had tic disorders (346; 57%) followed by dystonia (72; 12%); other movement disorders were less frequent (<5%).  Mean onset age of other movement disorders was 8.6 ± 5.7 years; mean delay of diagnosis was 11.1 ± 12.5 years.  Psychogenic movement disorders had a later onset than all other movement disorders (P < 0.01) apart from tremor and "other movement disorders." 
THERM