Table 1.

Demographic data and main subtypes of idiopathic cervical dystonia patients with (DHT+) and without (DHT–) dystonic head tremor.

	DHT+	DHT–	p value
Total number of patients	169 (57.6%)	124 (42.3%)	–
Age [Mean ± standard deviation (SD), Range] years	56.2 ± 13.11, 23–90	54.2 ± 12.61, 29–74	0.19
Sex (Male: M; Female: F)	F: 120 (71.0 %) ; M: 49 (29.0 %)	F: 77 (62.1 %); M: 47 (37.9 %)
Duration of illness (Mean ± SD, Range) in years	11.8 ± 8.69, 0.5–39	9.5 ± 8.91, 0.6–51	0.02
Number of subtypes
One subtype	35 (20.7%)	14 (11.2%)	0.03
Two subtypes	72 (42.6%)	49 (39.5%)	0.59
Three subtypes	37 (21.8%)	32 (25.8%)	0.43
Four subtypes	20 (11.8%)	21 (16.9%)	0.21
Five subtypes	05 (02.9%)	06 (04.8%)	0.40
Six subtypes	00	02 (01.6%)	–
Main subtype
Torticaput	97 (57.3%)	50 (40.3%)	0.01
Laterocaput	22 (13.0%)	25 (20.1%)	0.09
Laterocollis	18 (10.6%)	12 (9.6%)	0.78
Torticollis	12 (7.1%)	14(11.2%)	0.21
Retrocaput	7 (4.1%)	7 (5.6%)	0.55
lateral shift	5 (2.9%)	00	0.19
Retrocollis	4 (2.3%)	4 (3.2%)	0.65
Anterocollis	2 (1.1%)	6 (4.8%)	0.05
Anterocaput	1 (.05%)	4 (3.2%)	0.08
Anterior sagittal shift	1 (.05%)	1 (.05%)	0.82