Table 1.

Demographic and clinical data

	Cervical dystonia	Blepharospasm	Laryngeal dystonia	Writer’s cramp	Controls	p-value*
Number of subjects	11	10	12	12	24	n/a
Age (mean), [range]	57.28 [29–77]	59.2 [45–69]	54.75 [44–66]	52.75 [21–72]	52.13 [38–71]	all between-patient p > 0.16; all patient-control p > 0.05
Gender (Female/Male)	7/4	9/1	8/4	6/5	12/12	all between-patient p > 0.15; all patient-control p > 0.05
Disease Duration (yrs) mean ± standard deviation	12.3±8.9	7.3±4.5	10.2±6.3	16.5±12.9	n/a	all between-patient p > 0.05

^*Comparisons were made between each patient group and controls as well as between the patient groups using two-sample t-test or Fisher’s exact test, wherever appropriate. n/a – not applicable