Table 2.

Comparison of clinical features between the PKD patients with and without PRRT2 mutations

	patients with PRRT2 mutations	patients without PRRT2 mutations	p
No. of subjects	5	15
Male(%)	4(80%)	13(86.7%)	1.000
Age at onset (years)			0.502
Mean (SD)	7.1(3)	8.4(3.7)
Median	7	9
Main phenotype, n			0.338
Choreoathetosis	2	2
Dystonia	1	9
Mixed	2	4
Laterality of dyskinesia			0.530
Unilateral	0	4
Biateral	5	11
Involved limb			0.805
Upper limbs	0	3
Lower limbs	2	6
Both	3	6
Frequency of attack/day, n			0.805
< 5	2	6
5–10	3	6
> 10	0	3
Comorbidity	3	1	0.032

P^* < 0.05