Table 1

Demographic features of subjects with TD and subjects with TD plus allergic diseases

Variables	TD (n=135)	TD plus allergy (n=85)	t (χ²)	P value
Sex
Male	98	60	0.1035*	0.7476
Female	37	25
Age	7.2±1.5	7.6±1.6	1.8767†	0.0619
Type of TD
TTD	58	27	2.9433*	0.2296
CTD	37	30
TS	40	28
Severity
Mild TD	80	35	7.8004*	0.0202
Moderate TD	42	34
Severe TD	13	16

*Pearson’s χ² test.
†t-test.
CTD, chronic tic disorder; TD, tic disorder; TS, Tourette syndrome; TTD, transient tic disorder.